| <!DOCTYPE HTML> |
| <html lang="en"> |
| <head> |
| <!-- Generated by javadoc (17) --> |
| <title>Source code</title> |
| <meta name="viewport" content="width=device-width, initial-scale=1"> |
| <meta name="description" content="source: package: org.apache.hadoop.hbase.constraint, class: Constraints"> |
| <meta name="generator" content="javadoc/SourceToHTMLConverter"> |
| <link rel="stylesheet" type="text/css" href="../../../../../../stylesheet.css" title="Style"> |
| </head> |
| <body class="source-page"> |
| <main role="main"> |
| <div class="source-container"> |
| <pre><span class="source-line-no">001</span><span id="line-1">/*</span> |
| <span class="source-line-no">002</span><span id="line-2"> * Licensed to the Apache Software Foundation (ASF) under one</span> |
| <span class="source-line-no">003</span><span id="line-3"> * or more contributor license agreements. See the NOTICE file</span> |
| <span class="source-line-no">004</span><span id="line-4"> * distributed with this work for additional information</span> |
| <span class="source-line-no">005</span><span id="line-5"> * regarding copyright ownership. The ASF licenses this file</span> |
| <span class="source-line-no">006</span><span id="line-6"> * to you under the Apache License, Version 2.0 (the</span> |
| <span class="source-line-no">007</span><span id="line-7"> * "License"); you may not use this file except in compliance</span> |
| <span class="source-line-no">008</span><span id="line-8"> * with the License. You may obtain a copy of the License at</span> |
| <span class="source-line-no">009</span><span id="line-9"> *</span> |
| <span class="source-line-no">010</span><span id="line-10"> * http://www.apache.org/licenses/LICENSE-2.0</span> |
| <span class="source-line-no">011</span><span id="line-11"> *</span> |
| <span class="source-line-no">012</span><span id="line-12"> * Unless required by applicable law or agreed to in writing, software</span> |
| <span class="source-line-no">013</span><span id="line-13"> * distributed under the License is distributed on an "AS IS" BASIS,</span> |
| <span class="source-line-no">014</span><span id="line-14"> * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.</span> |
| <span class="source-line-no">015</span><span id="line-15"> * See the License for the specific language governing permissions and</span> |
| <span class="source-line-no">016</span><span id="line-16"> * limitations under the License.</span> |
| <span class="source-line-no">017</span><span id="line-17"> */</span> |
| <span class="source-line-no">018</span><span id="line-18">package org.apache.hadoop.hbase.constraint;</span> |
| <span class="source-line-no">019</span><span id="line-19"></span> |
| <span class="source-line-no">020</span><span id="line-20">import java.io.ByteArrayInputStream;</span> |
| <span class="source-line-no">021</span><span id="line-21">import java.io.ByteArrayOutputStream;</span> |
| <span class="source-line-no">022</span><span id="line-22">import java.io.DataOutputStream;</span> |
| <span class="source-line-no">023</span><span id="line-23">import java.io.IOException;</span> |
| <span class="source-line-no">024</span><span id="line-24">import java.lang.reflect.InvocationTargetException;</span> |
| <span class="source-line-no">025</span><span id="line-25">import java.util.ArrayList;</span> |
| <span class="source-line-no">026</span><span id="line-26">import java.util.Collections;</span> |
| <span class="source-line-no">027</span><span id="line-27">import java.util.Comparator;</span> |
| <span class="source-line-no">028</span><span id="line-28">import java.util.List;</span> |
| <span class="source-line-no">029</span><span id="line-29">import java.util.Map;</span> |
| <span class="source-line-no">030</span><span id="line-30">import java.util.Map.Entry;</span> |
| <span class="source-line-no">031</span><span id="line-31">import java.util.regex.Pattern;</span> |
| <span class="source-line-no">032</span><span id="line-32">import org.apache.hadoop.conf.Configuration;</span> |
| <span class="source-line-no">033</span><span id="line-33">import org.apache.hadoop.hbase.client.TableDescriptor;</span> |
| <span class="source-line-no">034</span><span id="line-34">import org.apache.hadoop.hbase.client.TableDescriptorBuilder;</span> |
| <span class="source-line-no">035</span><span id="line-35">import org.apache.hadoop.hbase.util.Bytes;</span> |
| <span class="source-line-no">036</span><span id="line-36">import org.apache.hadoop.hbase.util.Pair;</span> |
| <span class="source-line-no">037</span><span id="line-37">import org.apache.yetus.audience.InterfaceAudience;</span> |
| <span class="source-line-no">038</span><span id="line-38">import org.slf4j.Logger;</span> |
| <span class="source-line-no">039</span><span id="line-39">import org.slf4j.LoggerFactory;</span> |
| <span class="source-line-no">040</span><span id="line-40"></span> |
| <span class="source-line-no">041</span><span id="line-41">/**</span> |
| <span class="source-line-no">042</span><span id="line-42"> * Utilities for adding/removing constraints from a table.</span> |
| <span class="source-line-no">043</span><span id="line-43"> * <p/></span> |
| <span class="source-line-no">044</span><span id="line-44"> * Since {@link TableDescriptor} is immutable now, you should use {@link TableDescriptorBuilder}.</span> |
| <span class="source-line-no">045</span><span id="line-45"> * And when disabling or removing constraints, you could use</span> |
| <span class="source-line-no">046</span><span id="line-46"> * {@link TableDescriptorBuilder#newBuilder(TableDescriptor)} to clone the old</span> |
| <span class="source-line-no">047</span><span id="line-47"> * {@link TableDescriptor} and then pass it the below methods.</span> |
| <span class="source-line-no">048</span><span id="line-48"> */</span> |
| <span class="source-line-no">049</span><span id="line-49">@InterfaceAudience.Public</span> |
| <span class="source-line-no">050</span><span id="line-50">public final class Constraints {</span> |
| <span class="source-line-no">051</span><span id="line-51"> private static final int DEFAULT_PRIORITY = -1;</span> |
| <span class="source-line-no">052</span><span id="line-52"></span> |
| <span class="source-line-no">053</span><span id="line-53"> private Constraints() {</span> |
| <span class="source-line-no">054</span><span id="line-54"> }</span> |
| <span class="source-line-no">055</span><span id="line-55"></span> |
| <span class="source-line-no">056</span><span id="line-56"> private static final Logger LOG = LoggerFactory.getLogger(Constraints.class);</span> |
| <span class="source-line-no">057</span><span id="line-57"> private static final String CONSTRAINT_HTD_KEY_PREFIX = "constraint $";</span> |
| <span class="source-line-no">058</span><span id="line-58"> private static final Pattern CONSTRAINT_HTD_ATTR_KEY_PATTERN =</span> |
| <span class="source-line-no">059</span><span id="line-59"> Pattern.compile(CONSTRAINT_HTD_KEY_PREFIX, Pattern.LITERAL);</span> |
| <span class="source-line-no">060</span><span id="line-60"></span> |
| <span class="source-line-no">061</span><span id="line-61"> // configuration key for if the constraint is enabled</span> |
| <span class="source-line-no">062</span><span id="line-62"> private static final String ENABLED_KEY = "_ENABLED";</span> |
| <span class="source-line-no">063</span><span id="line-63"> // configuration key for the priority</span> |
| <span class="source-line-no">064</span><span id="line-64"> private static final String PRIORITY_KEY = "_PRIORITY";</span> |
| <span class="source-line-no">065</span><span id="line-65"></span> |
| <span class="source-line-no">066</span><span id="line-66"> // smallest priority a constraiNt can have</span> |
| <span class="source-line-no">067</span><span id="line-67"> private static final long MIN_PRIORITY = 0L;</span> |
| <span class="source-line-no">068</span><span id="line-68"> // ensure a priority less than the smallest we could intentionally set</span> |
| <span class="source-line-no">069</span><span id="line-69"> private static final long UNSET_PRIORITY = MIN_PRIORITY - 1;</span> |
| <span class="source-line-no">070</span><span id="line-70"></span> |
| <span class="source-line-no">071</span><span id="line-71"> private static String COUNTER_KEY = "hbase.constraint.counter";</span> |
| <span class="source-line-no">072</span><span id="line-72"></span> |
| <span class="source-line-no">073</span><span id="line-73"> /**</span> |
| <span class="source-line-no">074</span><span id="line-74"> * Enable constraints on a table.</span> |
| <span class="source-line-no">075</span><span id="line-75"> * <p/></span> |
| <span class="source-line-no">076</span><span id="line-76"> * Currently, if you attempt to add a constraint to the table, then Constraints will automatically</span> |
| <span class="source-line-no">077</span><span id="line-77"> * be turned on.</span> |
| <span class="source-line-no">078</span><span id="line-78"> */</span> |
| <span class="source-line-no">079</span><span id="line-79"> public static TableDescriptorBuilder enable(TableDescriptorBuilder builder) throws IOException {</span> |
| <span class="source-line-no">080</span><span id="line-80"> if (!builder.hasCoprocessor(ConstraintProcessor.class.getName())) {</span> |
| <span class="source-line-no">081</span><span id="line-81"> builder.setCoprocessor(ConstraintProcessor.class.getName());</span> |
| <span class="source-line-no">082</span><span id="line-82"> }</span> |
| <span class="source-line-no">083</span><span id="line-83"> return builder;</span> |
| <span class="source-line-no">084</span><span id="line-84"> }</span> |
| <span class="source-line-no">085</span><span id="line-85"></span> |
| <span class="source-line-no">086</span><span id="line-86"> /**</span> |
| <span class="source-line-no">087</span><span id="line-87"> * Turn off processing constraints for a given table, even if constraints have been turned on or</span> |
| <span class="source-line-no">088</span><span id="line-88"> * added.</span> |
| <span class="source-line-no">089</span><span id="line-89"> */</span> |
| <span class="source-line-no">090</span><span id="line-90"> public static TableDescriptorBuilder disable(TableDescriptorBuilder builder) throws IOException {</span> |
| <span class="source-line-no">091</span><span id="line-91"> try {</span> |
| <span class="source-line-no">092</span><span id="line-92"> return builder.removeCoprocessor(ConstraintProcessor.class.getName());</span> |
| <span class="source-line-no">093</span><span id="line-93"> } catch (IllegalArgumentException e) {</span> |
| <span class="source-line-no">094</span><span id="line-94"> LOG.warn("ConstraintProcessor was unset.", e);</span> |
| <span class="source-line-no">095</span><span id="line-95"> return builder;</span> |
| <span class="source-line-no">096</span><span id="line-96"> }</span> |
| <span class="source-line-no">097</span><span id="line-97"> }</span> |
| <span class="source-line-no">098</span><span id="line-98"></span> |
| <span class="source-line-no">099</span><span id="line-99"> /**</span> |
| <span class="source-line-no">100</span><span id="line-100"> * Remove all {@link Constraint Constraints} that have been added to the table and turn off the</span> |
| <span class="source-line-no">101</span><span id="line-101"> * constraint processing.</span> |
| <span class="source-line-no">102</span><span id="line-102"> * <p/></span> |
| <span class="source-line-no">103</span><span id="line-103"> * All {@link Configuration Configurations} and their associated {@link Constraint} are removed.</span> |
| <span class="source-line-no">104</span><span id="line-104"> */</span> |
| <span class="source-line-no">105</span><span id="line-105"> public static TableDescriptorBuilder remove(TableDescriptorBuilder builder) throws IOException {</span> |
| <span class="source-line-no">106</span><span id="line-106"> disable(builder);</span> |
| <span class="source-line-no">107</span><span id="line-107"> return builder</span> |
| <span class="source-line-no">108</span><span id="line-108"> .removeValue((k, v) -> CONSTRAINT_HTD_ATTR_KEY_PATTERN.split(k.toString()).length == 2);</span> |
| <span class="source-line-no">109</span><span id="line-109"> }</span> |
| <span class="source-line-no">110</span><span id="line-110"></span> |
| <span class="source-line-no">111</span><span id="line-111"> /**</span> |
| <span class="source-line-no">112</span><span id="line-112"> * Check to see if the Constraint is currently set.</span> |
| <span class="source-line-no">113</span><span id="line-113"> * @param desc {@link TableDescriptor} to check</span> |
| <span class="source-line-no">114</span><span id="line-114"> * @param clazz {@link Constraint} class to check for.</span> |
| <span class="source-line-no">115</span><span id="line-115"> * @return <tt>true</tt> if the {@link Constraint} is present, even if it is disabled.</span> |
| <span class="source-line-no">116</span><span id="line-116"> * <tt>false</tt> otherwise.</span> |
| <span class="source-line-no">117</span><span id="line-117"> */</span> |
| <span class="source-line-no">118</span><span id="line-118"> public static boolean has(TableDescriptor desc, Class<? extends Constraint> clazz) {</span> |
| <span class="source-line-no">119</span><span id="line-119"> return getKeyValueForClass(desc, clazz) != null;</span> |
| <span class="source-line-no">120</span><span id="line-120"> }</span> |
| <span class="source-line-no">121</span><span id="line-121"></span> |
| <span class="source-line-no">122</span><span id="line-122"> /**</span> |
| <span class="source-line-no">123</span><span id="line-123"> * Get the kv {@link Entry} in the descriptor for the specified class</span> |
| <span class="source-line-no">124</span><span id="line-124"> * @param desc {@link TableDescriptor} to read</span> |
| <span class="source-line-no">125</span><span id="line-125"> * @param clazz To search for</span> |
| <span class="source-line-no">126</span><span id="line-126"> * @return The {@link Pair} of {@literal <key, value>} in the table, if that class is present.</span> |
| <span class="source-line-no">127</span><span id="line-127"> * {@code null} otherwise.</span> |
| <span class="source-line-no">128</span><span id="line-128"> */</span> |
| <span class="source-line-no">129</span><span id="line-129"> private static Pair<String, String> getKeyValueForClass(TableDescriptor desc,</span> |
| <span class="source-line-no">130</span><span id="line-130"> Class<? extends Constraint> clazz) {</span> |
| <span class="source-line-no">131</span><span id="line-131"> // get the serialized version of the constraint</span> |
| <span class="source-line-no">132</span><span id="line-132"> String key = serializeConstraintClass(clazz);</span> |
| <span class="source-line-no">133</span><span id="line-133"> String value = desc.getValue(key);</span> |
| <span class="source-line-no">134</span><span id="line-134"></span> |
| <span class="source-line-no">135</span><span id="line-135"> return value == null ? null : new Pair<>(key, value);</span> |
| <span class="source-line-no">136</span><span id="line-136"> }</span> |
| <span class="source-line-no">137</span><span id="line-137"></span> |
| <span class="source-line-no">138</span><span id="line-138"> /**</span> |
| <span class="source-line-no">139</span><span id="line-139"> * Get the kv {@link Entry} in the descriptor builder for the specified class</span> |
| <span class="source-line-no">140</span><span id="line-140"> * @param builder {@link TableDescriptorBuilder} to read</span> |
| <span class="source-line-no">141</span><span id="line-141"> * @param clazz To search for</span> |
| <span class="source-line-no">142</span><span id="line-142"> * @return The {@link Pair} of {@literal <key, value>} in the table, if that class is present.</span> |
| <span class="source-line-no">143</span><span id="line-143"> * {@code null} otherwise.</span> |
| <span class="source-line-no">144</span><span id="line-144"> */</span> |
| <span class="source-line-no">145</span><span id="line-145"> private static Pair<String, String> getKeyValueForClass(TableDescriptorBuilder builder,</span> |
| <span class="source-line-no">146</span><span id="line-146"> Class<? extends Constraint> clazz) {</span> |
| <span class="source-line-no">147</span><span id="line-147"> // get the serialized version of the constraint</span> |
| <span class="source-line-no">148</span><span id="line-148"> String key = serializeConstraintClass(clazz);</span> |
| <span class="source-line-no">149</span><span id="line-149"> String value = builder.getValue(key);</span> |
| <span class="source-line-no">150</span><span id="line-150"></span> |
| <span class="source-line-no">151</span><span id="line-151"> return value == null ? null : new Pair<>(key, value);</span> |
| <span class="source-line-no">152</span><span id="line-152"> }</span> |
| <span class="source-line-no">153</span><span id="line-153"></span> |
| <span class="source-line-no">154</span><span id="line-154"> /**</span> |
| <span class="source-line-no">155</span><span id="line-155"> * Add configuration-less constraints to the table.</span> |
| <span class="source-line-no">156</span><span id="line-156"> * <p/></span> |
| <span class="source-line-no">157</span><span id="line-157"> * This will overwrite any configuration associated with the previous constraint of the same</span> |
| <span class="source-line-no">158</span><span id="line-158"> * class.</span> |
| <span class="source-line-no">159</span><span id="line-159"> * <p/></span> |
| <span class="source-line-no">160</span><span id="line-160"> * Each constraint, when added to the table, will have a specific priority, dictating the order in</span> |
| <span class="source-line-no">161</span><span id="line-161"> * which the {@link Constraint} will be run. A {@link Constraint} earlier in the list will be run</span> |
| <span class="source-line-no">162</span><span id="line-162"> * before those later in the list. The same logic applies between two Constraints over time</span> |
| <span class="source-line-no">163</span><span id="line-163"> * (earlier added is run first on the regionserver).</span> |
| <span class="source-line-no">164</span><span id="line-164"> * @param builder {@link TableDescriptorBuilder} to add a {@link Constraint}</span> |
| <span class="source-line-no">165</span><span id="line-165"> * @param constraints {@link Constraint Constraints} to add. All constraints are considered</span> |
| <span class="source-line-no">166</span><span id="line-166"> * automatically enabled on add</span> |
| <span class="source-line-no">167</span><span id="line-167"> * @throws IOException If constraint could not be serialized/added to table</span> |
| <span class="source-line-no">168</span><span id="line-168"> */</span> |
| <span class="source-line-no">169</span><span id="line-169"> @SafeVarargs</span> |
| <span class="source-line-no">170</span><span id="line-170"> public static TableDescriptorBuilder add(TableDescriptorBuilder builder,</span> |
| <span class="source-line-no">171</span><span id="line-171"> Class<? extends Constraint>... constraints) throws IOException {</span> |
| <span class="source-line-no">172</span><span id="line-172"> // make sure constraints are enabled</span> |
| <span class="source-line-no">173</span><span id="line-173"> enable(builder);</span> |
| <span class="source-line-no">174</span><span id="line-174"> long priority = getNextPriority(builder);</span> |
| <span class="source-line-no">175</span><span id="line-175"></span> |
| <span class="source-line-no">176</span><span id="line-176"> // store each constraint</span> |
| <span class="source-line-no">177</span><span id="line-177"> for (Class<? extends Constraint> clazz : constraints) {</span> |
| <span class="source-line-no">178</span><span id="line-178"> addConstraint(builder, clazz, null, priority++);</span> |
| <span class="source-line-no">179</span><span id="line-179"> }</span> |
| <span class="source-line-no">180</span><span id="line-180"> return updateLatestPriority(builder, priority);</span> |
| <span class="source-line-no">181</span><span id="line-181"> }</span> |
| <span class="source-line-no">182</span><span id="line-182"></span> |
| <span class="source-line-no">183</span><span id="line-183"> /**</span> |
| <span class="source-line-no">184</span><span id="line-184"> * Add constraints and their associated configurations to the table.</span> |
| <span class="source-line-no">185</span><span id="line-185"> * <p></span> |
| <span class="source-line-no">186</span><span id="line-186"> * Adding the same constraint class twice will overwrite the first constraint's configuration</span> |
| <span class="source-line-no">187</span><span id="line-187"> * <p></span> |
| <span class="source-line-no">188</span><span id="line-188"> * Each constraint, when added to the table, will have a specific priority, dictating the order in</span> |
| <span class="source-line-no">189</span><span id="line-189"> * which the {@link Constraint} will be run. A {@link Constraint} earlier in the list will be run</span> |
| <span class="source-line-no">190</span><span id="line-190"> * before those later in the list. The same logic applies between two Constraints over time</span> |
| <span class="source-line-no">191</span><span id="line-191"> * (earlier added is run first on the regionserver).</span> |
| <span class="source-line-no">192</span><span id="line-192"> * @param builder {@link TableDescriptorBuilder} to add a {@link Constraint}</span> |
| <span class="source-line-no">193</span><span id="line-193"> * @param constraints {@link Pair} of a {@link Constraint} and its associated</span> |
| <span class="source-line-no">194</span><span id="line-194"> * {@link Configuration}. The Constraint will be configured on load with the</span> |
| <span class="source-line-no">195</span><span id="line-195"> * specified configuration.All constraints are considered automatically enabled</span> |
| <span class="source-line-no">196</span><span id="line-196"> * on add</span> |
| <span class="source-line-no">197</span><span id="line-197"> * @throws IOException if any constraint could not be deserialized. Assumes if 1 constraint is not</span> |
| <span class="source-line-no">198</span><span id="line-198"> * loaded properly, something has gone terribly wrong and that all constraints</span> |
| <span class="source-line-no">199</span><span id="line-199"> * need to be enforced.</span> |
| <span class="source-line-no">200</span><span id="line-200"> */</span> |
| <span class="source-line-no">201</span><span id="line-201"> @SafeVarargs</span> |
| <span class="source-line-no">202</span><span id="line-202"> public static TableDescriptorBuilder add(TableDescriptorBuilder builder,</span> |
| <span class="source-line-no">203</span><span id="line-203"> Pair<Class<? extends Constraint>, Configuration>... constraints) throws IOException {</span> |
| <span class="source-line-no">204</span><span id="line-204"> enable(builder);</span> |
| <span class="source-line-no">205</span><span id="line-205"> long priority = getNextPriority(builder);</span> |
| <span class="source-line-no">206</span><span id="line-206"> for (Pair<Class<? extends Constraint>, Configuration> pair : constraints) {</span> |
| <span class="source-line-no">207</span><span id="line-207"> addConstraint(builder, pair.getFirst(), pair.getSecond(), priority++);</span> |
| <span class="source-line-no">208</span><span id="line-208"> }</span> |
| <span class="source-line-no">209</span><span id="line-209"> return updateLatestPriority(builder, priority);</span> |
| <span class="source-line-no">210</span><span id="line-210"> }</span> |
| <span class="source-line-no">211</span><span id="line-211"></span> |
| <span class="source-line-no">212</span><span id="line-212"> /**</span> |
| <span class="source-line-no">213</span><span id="line-213"> * Add a {@link Constraint} to the table with the given configuration</span> |
| <span class="source-line-no">214</span><span id="line-214"> * <p/></span> |
| <span class="source-line-no">215</span><span id="line-215"> * Each constraint, when added to the table, will have a specific priority, dictating the order in</span> |
| <span class="source-line-no">216</span><span id="line-216"> * which the {@link Constraint} will be run. A {@link Constraint} added will run on the</span> |
| <span class="source-line-no">217</span><span id="line-217"> * regionserver before those added to the {@link TableDescriptorBuilder} later.</span> |
| <span class="source-line-no">218</span><span id="line-218"> * @param builder {@link TableDescriptorBuilder} to add a {@link Constraint}</span> |
| <span class="source-line-no">219</span><span id="line-219"> * @param constraint to be added</span> |
| <span class="source-line-no">220</span><span id="line-220"> * @param conf configuration associated with the constraint</span> |
| <span class="source-line-no">221</span><span id="line-221"> * @throws IOException if any constraint could not be deserialized. Assumes if 1 constraint is not</span> |
| <span class="source-line-no">222</span><span id="line-222"> * loaded properly, something has gone terribly wrong and that all constraints</span> |
| <span class="source-line-no">223</span><span id="line-223"> * need to be enforced.</span> |
| <span class="source-line-no">224</span><span id="line-224"> */</span> |
| <span class="source-line-no">225</span><span id="line-225"> public static TableDescriptorBuilder add(TableDescriptorBuilder builder,</span> |
| <span class="source-line-no">226</span><span id="line-226"> Class<? extends Constraint> constraint, Configuration conf) throws IOException {</span> |
| <span class="source-line-no">227</span><span id="line-227"> enable(builder);</span> |
| <span class="source-line-no">228</span><span id="line-228"> long priority = getNextPriority(builder);</span> |
| <span class="source-line-no">229</span><span id="line-229"> addConstraint(builder, constraint, conf, priority++);</span> |
| <span class="source-line-no">230</span><span id="line-230"></span> |
| <span class="source-line-no">231</span><span id="line-231"> return updateLatestPriority(builder, priority);</span> |
| <span class="source-line-no">232</span><span id="line-232"> }</span> |
| <span class="source-line-no">233</span><span id="line-233"></span> |
| <span class="source-line-no">234</span><span id="line-234"> /**</span> |
| <span class="source-line-no">235</span><span id="line-235"> * Write the raw constraint and configuration to the descriptor.</span> |
| <span class="source-line-no">236</span><span id="line-236"> * <p/></span> |
| <span class="source-line-no">237</span><span id="line-237"> * This method takes care of creating a new configuration based on the passed in configuration and</span> |
| <span class="source-line-no">238</span><span id="line-238"> * then updating that with enabled and priority of the constraint.</span> |
| <span class="source-line-no">239</span><span id="line-239"> * <p/></span> |
| <span class="source-line-no">240</span><span id="line-240"> * When a constraint is added, it is automatically enabled.</span> |
| <span class="source-line-no">241</span><span id="line-241"> */</span> |
| <span class="source-line-no">242</span><span id="line-242"> private static TableDescriptorBuilder addConstraint(TableDescriptorBuilder builder,</span> |
| <span class="source-line-no">243</span><span id="line-243"> Class<? extends Constraint> clazz, Configuration conf, long priority) throws IOException {</span> |
| <span class="source-line-no">244</span><span id="line-244"> return writeConstraint(builder, serializeConstraintClass(clazz),</span> |
| <span class="source-line-no">245</span><span id="line-245"> configure(conf, true, priority));</span> |
| <span class="source-line-no">246</span><span id="line-246"> }</span> |
| <span class="source-line-no">247</span><span id="line-247"></span> |
| <span class="source-line-no">248</span><span id="line-248"> /**</span> |
| <span class="source-line-no">249</span><span id="line-249"> * Setup the configuration for a constraint as to whether it is enabled and its priority</span> |
| <span class="source-line-no">250</span><span id="line-250"> * @param conf on which to base the new configuration</span> |
| <span class="source-line-no">251</span><span id="line-251"> * @param enabled <tt>true</tt> if it should be run</span> |
| <span class="source-line-no">252</span><span id="line-252"> * @param priority relative to other constraints</span> |
| <span class="source-line-no">253</span><span id="line-253"> * @return a new configuration, storable in the {@link TableDescriptor}</span> |
| <span class="source-line-no">254</span><span id="line-254"> */</span> |
| <span class="source-line-no">255</span><span id="line-255"> private static Configuration configure(Configuration conf, boolean enabled, long priority) {</span> |
| <span class="source-line-no">256</span><span id="line-256"> // create the configuration to actually be stored</span> |
| <span class="source-line-no">257</span><span id="line-257"> // clone if possible, but otherwise just create an empty configuration</span> |
| <span class="source-line-no">258</span><span id="line-258"> Configuration toWrite = conf == null ? new Configuration() : new Configuration(conf);</span> |
| <span class="source-line-no">259</span><span id="line-259"></span> |
| <span class="source-line-no">260</span><span id="line-260"> // update internal properties</span> |
| <span class="source-line-no">261</span><span id="line-261"> toWrite.setBooleanIfUnset(ENABLED_KEY, enabled);</span> |
| <span class="source-line-no">262</span><span id="line-262"></span> |
| <span class="source-line-no">263</span><span id="line-263"> // set if unset long</span> |
| <span class="source-line-no">264</span><span id="line-264"> if (toWrite.getLong(PRIORITY_KEY, UNSET_PRIORITY) == UNSET_PRIORITY) {</span> |
| <span class="source-line-no">265</span><span id="line-265"> toWrite.setLong(PRIORITY_KEY, priority);</span> |
| <span class="source-line-no">266</span><span id="line-266"> }</span> |
| <span class="source-line-no">267</span><span id="line-267"></span> |
| <span class="source-line-no">268</span><span id="line-268"> return toWrite;</span> |
| <span class="source-line-no">269</span><span id="line-269"> }</span> |
| <span class="source-line-no">270</span><span id="line-270"></span> |
| <span class="source-line-no">271</span><span id="line-271"> /**</span> |
| <span class="source-line-no">272</span><span id="line-272"> * Just write the class to a String representation of the class as a key for the</span> |
| <span class="source-line-no">273</span><span id="line-273"> * {@link TableDescriptor}</span> |
| <span class="source-line-no">274</span><span id="line-274"> * @param clazz Constraint class to convert to a {@link TableDescriptor} key</span> |
| <span class="source-line-no">275</span><span id="line-275"> * @return key to store in the {@link TableDescriptor}</span> |
| <span class="source-line-no">276</span><span id="line-276"> */</span> |
| <span class="source-line-no">277</span><span id="line-277"> private static String serializeConstraintClass(Class<? extends Constraint> clazz) {</span> |
| <span class="source-line-no">278</span><span id="line-278"> String constraintClazz = clazz.getName();</span> |
| <span class="source-line-no">279</span><span id="line-279"> return CONSTRAINT_HTD_KEY_PREFIX + constraintClazz;</span> |
| <span class="source-line-no">280</span><span id="line-280"> }</span> |
| <span class="source-line-no">281</span><span id="line-281"></span> |
| <span class="source-line-no">282</span><span id="line-282"> /**</span> |
| <span class="source-line-no">283</span><span id="line-283"> * Write the given key and associated configuration to the {@link TableDescriptorBuilder}.</span> |
| <span class="source-line-no">284</span><span id="line-284"> */</span> |
| <span class="source-line-no">285</span><span id="line-285"> private static TableDescriptorBuilder writeConstraint(TableDescriptorBuilder builder, String key,</span> |
| <span class="source-line-no">286</span><span id="line-286"> Configuration conf) throws IOException {</span> |
| <span class="source-line-no">287</span><span id="line-287"> // store the key and conf in the descriptor</span> |
| <span class="source-line-no">288</span><span id="line-288"> return builder.setValue(key, serializeConfiguration(conf));</span> |
| <span class="source-line-no">289</span><span id="line-289"> }</span> |
| <span class="source-line-no">290</span><span id="line-290"></span> |
| <span class="source-line-no">291</span><span id="line-291"> /**</span> |
| <span class="source-line-no">292</span><span id="line-292"> * Write the configuration to a String</span> |
| <span class="source-line-no">293</span><span id="line-293"> * @param conf to write</span> |
| <span class="source-line-no">294</span><span id="line-294"> * @return String representation of that configuration</span> |
| <span class="source-line-no">295</span><span id="line-295"> */</span> |
| <span class="source-line-no">296</span><span id="line-296"> private static String serializeConfiguration(Configuration conf) throws IOException {</span> |
| <span class="source-line-no">297</span><span id="line-297"> // write the configuration out to the data stream</span> |
| <span class="source-line-no">298</span><span id="line-298"> ByteArrayOutputStream bos = new ByteArrayOutputStream();</span> |
| <span class="source-line-no">299</span><span id="line-299"> DataOutputStream dos = new DataOutputStream(bos);</span> |
| <span class="source-line-no">300</span><span id="line-300"> conf.writeXml(dos);</span> |
| <span class="source-line-no">301</span><span id="line-301"> dos.flush();</span> |
| <span class="source-line-no">302</span><span id="line-302"> byte[] data = bos.toByteArray();</span> |
| <span class="source-line-no">303</span><span id="line-303"> return Bytes.toString(data);</span> |
| <span class="source-line-no">304</span><span id="line-304"> }</span> |
| <span class="source-line-no">305</span><span id="line-305"></span> |
| <span class="source-line-no">306</span><span id="line-306"> /**</span> |
| <span class="source-line-no">307</span><span id="line-307"> * Read the {@link Configuration} stored in the byte stream.</span> |
| <span class="source-line-no">308</span><span id="line-308"> * @param bytes to read from</span> |
| <span class="source-line-no">309</span><span id="line-309"> * @return A valid configuration</span> |
| <span class="source-line-no">310</span><span id="line-310"> */</span> |
| <span class="source-line-no">311</span><span id="line-311"> private static Configuration readConfiguration(byte[] bytes) throws IOException {</span> |
| <span class="source-line-no">312</span><span id="line-312"> ByteArrayInputStream is = new ByteArrayInputStream(bytes);</span> |
| <span class="source-line-no">313</span><span id="line-313"> Configuration conf = new Configuration(false);</span> |
| <span class="source-line-no">314</span><span id="line-314"> conf.addResource(is);</span> |
| <span class="source-line-no">315</span><span id="line-315"> return conf;</span> |
| <span class="source-line-no">316</span><span id="line-316"> }</span> |
| <span class="source-line-no">317</span><span id="line-317"></span> |
| <span class="source-line-no">318</span><span id="line-318"> /**</span> |
| <span class="source-line-no">319</span><span id="line-319"> * Read in the configuration from the String encoded configuration</span> |
| <span class="source-line-no">320</span><span id="line-320"> * @param bytes to read from</span> |
| <span class="source-line-no">321</span><span id="line-321"> * @return A valid configuration</span> |
| <span class="source-line-no">322</span><span id="line-322"> * @throws IOException if the configuration could not be read</span> |
| <span class="source-line-no">323</span><span id="line-323"> */</span> |
| <span class="source-line-no">324</span><span id="line-324"> private static Configuration readConfiguration(String bytes) throws IOException {</span> |
| <span class="source-line-no">325</span><span id="line-325"> return readConfiguration(Bytes.toBytes(bytes));</span> |
| <span class="source-line-no">326</span><span id="line-326"> }</span> |
| <span class="source-line-no">327</span><span id="line-327"></span> |
| <span class="source-line-no">328</span><span id="line-328"> private static long getNextPriority(TableDescriptorBuilder builder) {</span> |
| <span class="source-line-no">329</span><span id="line-329"> String value = builder.getValue(COUNTER_KEY);</span> |
| <span class="source-line-no">330</span><span id="line-330"></span> |
| <span class="source-line-no">331</span><span id="line-331"> long priority;</span> |
| <span class="source-line-no">332</span><span id="line-332"> // get the current priority</span> |
| <span class="source-line-no">333</span><span id="line-333"> if (value == null) {</span> |
| <span class="source-line-no">334</span><span id="line-334"> priority = MIN_PRIORITY;</span> |
| <span class="source-line-no">335</span><span id="line-335"> } else {</span> |
| <span class="source-line-no">336</span><span id="line-336"> priority = Long.parseLong(value) + 1;</span> |
| <span class="source-line-no">337</span><span id="line-337"> }</span> |
| <span class="source-line-no">338</span><span id="line-338"></span> |
| <span class="source-line-no">339</span><span id="line-339"> return priority;</span> |
| <span class="source-line-no">340</span><span id="line-340"> }</span> |
| <span class="source-line-no">341</span><span id="line-341"></span> |
| <span class="source-line-no">342</span><span id="line-342"> private static TableDescriptorBuilder updateLatestPriority(TableDescriptorBuilder builder,</span> |
| <span class="source-line-no">343</span><span id="line-343"> long priority) {</span> |
| <span class="source-line-no">344</span><span id="line-344"> // update the max priority</span> |
| <span class="source-line-no">345</span><span id="line-345"> return builder.setValue(COUNTER_KEY, Long.toString(priority));</span> |
| <span class="source-line-no">346</span><span id="line-346"> }</span> |
| <span class="source-line-no">347</span><span id="line-347"></span> |
| <span class="source-line-no">348</span><span id="line-348"> /**</span> |
| <span class="source-line-no">349</span><span id="line-349"> * Update the configuration for the {@link Constraint}; does not change the order in which the</span> |
| <span class="source-line-no">350</span><span id="line-350"> * constraint is run.</span> |
| <span class="source-line-no">351</span><span id="line-351"> * @param builder {@link TableDescriptorBuilder} to update</span> |
| <span class="source-line-no">352</span><span id="line-352"> * @param clazz {@link Constraint} to update</span> |
| <span class="source-line-no">353</span><span id="line-353"> * @param configuration to update the {@link Constraint} with.</span> |
| <span class="source-line-no">354</span><span id="line-354"> * @throws IOException if the Constraint was not stored correctly</span> |
| <span class="source-line-no">355</span><span id="line-355"> * @throws IllegalArgumentException if the Constraint was not present on this table.</span> |
| <span class="source-line-no">356</span><span id="line-356"> */</span> |
| <span class="source-line-no">357</span><span id="line-357"> public static TableDescriptorBuilder setConfiguration(TableDescriptorBuilder builder,</span> |
| <span class="source-line-no">358</span><span id="line-358"> Class<? extends Constraint> clazz, Configuration configuration)</span> |
| <span class="source-line-no">359</span><span id="line-359"> throws IOException, IllegalArgumentException {</span> |
| <span class="source-line-no">360</span><span id="line-360"> // get the entry for this class</span> |
| <span class="source-line-no">361</span><span id="line-361"> Pair<String, String> e = getKeyValueForClass(builder, clazz);</span> |
| <span class="source-line-no">362</span><span id="line-362"></span> |
| <span class="source-line-no">363</span><span id="line-363"> if (e == null) {</span> |
| <span class="source-line-no">364</span><span id="line-364"> throw new IllegalArgumentException(</span> |
| <span class="source-line-no">365</span><span id="line-365"> "Constraint: " + clazz.getName() + " is not associated with this table.");</span> |
| <span class="source-line-no">366</span><span id="line-366"> }</span> |
| <span class="source-line-no">367</span><span id="line-367"></span> |
| <span class="source-line-no">368</span><span id="line-368"> // clone over the configuration elements</span> |
| <span class="source-line-no">369</span><span id="line-369"> Configuration conf = new Configuration(configuration);</span> |
| <span class="source-line-no">370</span><span id="line-370"></span> |
| <span class="source-line-no">371</span><span id="line-371"> // read in the previous info about the constraint</span> |
| <span class="source-line-no">372</span><span id="line-372"> Configuration internal = readConfiguration(e.getSecond());</span> |
| <span class="source-line-no">373</span><span id="line-373"></span> |
| <span class="source-line-no">374</span><span id="line-374"> // update the fields based on the previous settings</span> |
| <span class="source-line-no">375</span><span id="line-375"> conf.setIfUnset(ENABLED_KEY, internal.get(ENABLED_KEY));</span> |
| <span class="source-line-no">376</span><span id="line-376"> conf.setIfUnset(PRIORITY_KEY, internal.get(PRIORITY_KEY));</span> |
| <span class="source-line-no">377</span><span id="line-377"></span> |
| <span class="source-line-no">378</span><span id="line-378"> // update the current value</span> |
| <span class="source-line-no">379</span><span id="line-379"> return writeConstraint(builder, e.getFirst(), conf);</span> |
| <span class="source-line-no">380</span><span id="line-380"> }</span> |
| <span class="source-line-no">381</span><span id="line-381"></span> |
| <span class="source-line-no">382</span><span id="line-382"> /**</span> |
| <span class="source-line-no">383</span><span id="line-383"> * Remove the constraint (and associated information) for the table descriptor.</span> |
| <span class="source-line-no">384</span><span id="line-384"> * @param builder {@link TableDescriptorBuilder} to modify</span> |
| <span class="source-line-no">385</span><span id="line-385"> * @param clazz {@link Constraint} class to remove</span> |
| <span class="source-line-no">386</span><span id="line-386"> */</span> |
| <span class="source-line-no">387</span><span id="line-387"> public static TableDescriptorBuilder remove(TableDescriptorBuilder builder,</span> |
| <span class="source-line-no">388</span><span id="line-388"> Class<? extends Constraint> clazz) {</span> |
| <span class="source-line-no">389</span><span id="line-389"> String key = serializeConstraintClass(clazz);</span> |
| <span class="source-line-no">390</span><span id="line-390"> return builder.removeValue(key);</span> |
| <span class="source-line-no">391</span><span id="line-391"> }</span> |
| <span class="source-line-no">392</span><span id="line-392"></span> |
| <span class="source-line-no">393</span><span id="line-393"> /**</span> |
| <span class="source-line-no">394</span><span id="line-394"> * Enable the given {@link Constraint}. Retains all the information (e.g. Configuration) for the</span> |
| <span class="source-line-no">395</span><span id="line-395"> * {@link Constraint}, but makes sure that it gets loaded on the table.</span> |
| <span class="source-line-no">396</span><span id="line-396"> * @param builder {@link TableDescriptorBuilder} to modify</span> |
| <span class="source-line-no">397</span><span id="line-397"> * @param clazz {@link Constraint} to enable</span> |
| <span class="source-line-no">398</span><span id="line-398"> * @throws IOException If the constraint cannot be properly deserialized</span> |
| <span class="source-line-no">399</span><span id="line-399"> */</span> |
| <span class="source-line-no">400</span><span id="line-400"> public static void enableConstraint(TableDescriptorBuilder builder,</span> |
| <span class="source-line-no">401</span><span id="line-401"> Class<? extends Constraint> clazz) throws IOException {</span> |
| <span class="source-line-no">402</span><span id="line-402"> changeConstraintEnabled(builder, clazz, true);</span> |
| <span class="source-line-no">403</span><span id="line-403"> }</span> |
| <span class="source-line-no">404</span><span id="line-404"></span> |
| <span class="source-line-no">405</span><span id="line-405"> /**</span> |
| <span class="source-line-no">406</span><span id="line-406"> * Disable the given {@link Constraint}. Retains all the information (e.g. Configuration) for the</span> |
| <span class="source-line-no">407</span><span id="line-407"> * {@link Constraint}, but it just doesn't load the {@link Constraint} on the table.</span> |
| <span class="source-line-no">408</span><span id="line-408"> * @param builder {@link TableDescriptorBuilder} to modify</span> |
| <span class="source-line-no">409</span><span id="line-409"> * @param clazz {@link Constraint} to disable.</span> |
| <span class="source-line-no">410</span><span id="line-410"> * @throws IOException if the constraint cannot be found</span> |
| <span class="source-line-no">411</span><span id="line-411"> */</span> |
| <span class="source-line-no">412</span><span id="line-412"> public static void disableConstraint(TableDescriptorBuilder builder,</span> |
| <span class="source-line-no">413</span><span id="line-413"> Class<? extends Constraint> clazz) throws IOException {</span> |
| <span class="source-line-no">414</span><span id="line-414"> changeConstraintEnabled(builder, clazz, false);</span> |
| <span class="source-line-no">415</span><span id="line-415"> }</span> |
| <span class="source-line-no">416</span><span id="line-416"></span> |
| <span class="source-line-no">417</span><span id="line-417"> /**</span> |
| <span class="source-line-no">418</span><span id="line-418"> * Change the whether the constraint (if it is already present) is enabled or disabled.</span> |
| <span class="source-line-no">419</span><span id="line-419"> */</span> |
| <span class="source-line-no">420</span><span id="line-420"> private static TableDescriptorBuilder changeConstraintEnabled(TableDescriptorBuilder builder,</span> |
| <span class="source-line-no">421</span><span id="line-421"> Class<? extends Constraint> clazz, boolean enabled) throws IOException {</span> |
| <span class="source-line-no">422</span><span id="line-422"> // get the original constraint</span> |
| <span class="source-line-no">423</span><span id="line-423"> Pair<String, String> entry = getKeyValueForClass(builder, clazz);</span> |
| <span class="source-line-no">424</span><span id="line-424"> if (entry == null) {</span> |
| <span class="source-line-no">425</span><span id="line-425"> throw new IllegalArgumentException("Constraint: " + clazz.getName()</span> |
| <span class="source-line-no">426</span><span id="line-426"> + " is not associated with this table. You can't enable it!");</span> |
| <span class="source-line-no">427</span><span id="line-427"> }</span> |
| <span class="source-line-no">428</span><span id="line-428"></span> |
| <span class="source-line-no">429</span><span id="line-429"> // create a new configuration from that conf</span> |
| <span class="source-line-no">430</span><span id="line-430"> Configuration conf = readConfiguration(entry.getSecond());</span> |
| <span class="source-line-no">431</span><span id="line-431"></span> |
| <span class="source-line-no">432</span><span id="line-432"> // set that it is enabled</span> |
| <span class="source-line-no">433</span><span id="line-433"> conf.setBoolean(ENABLED_KEY, enabled);</span> |
| <span class="source-line-no">434</span><span id="line-434"></span> |
| <span class="source-line-no">435</span><span id="line-435"> // write it back out</span> |
| <span class="source-line-no">436</span><span id="line-436"> return writeConstraint(builder, entry.getFirst(), conf);</span> |
| <span class="source-line-no">437</span><span id="line-437"> }</span> |
| <span class="source-line-no">438</span><span id="line-438"></span> |
| <span class="source-line-no">439</span><span id="line-439"> /**</span> |
| <span class="source-line-no">440</span><span id="line-440"> * Check to see if the given constraint is enabled.</span> |
| <span class="source-line-no">441</span><span id="line-441"> * @param desc {@link TableDescriptor} to check.</span> |
| <span class="source-line-no">442</span><span id="line-442"> * @param clazz {@link Constraint} to check for</span> |
| <span class="source-line-no">443</span><span id="line-443"> * @return <tt>true</tt> if the {@link Constraint} is present and enabled. <tt>false</tt></span> |
| <span class="source-line-no">444</span><span id="line-444"> * otherwise.</span> |
| <span class="source-line-no">445</span><span id="line-445"> * @throws IOException If the constraint has improperly stored in the table</span> |
| <span class="source-line-no">446</span><span id="line-446"> */</span> |
| <span class="source-line-no">447</span><span id="line-447"> public static boolean enabled(TableDescriptor desc, Class<? extends Constraint> clazz)</span> |
| <span class="source-line-no">448</span><span id="line-448"> throws IOException {</span> |
| <span class="source-line-no">449</span><span id="line-449"> // get the kv</span> |
| <span class="source-line-no">450</span><span id="line-450"> Pair<String, String> entry = getKeyValueForClass(desc, clazz);</span> |
| <span class="source-line-no">451</span><span id="line-451"> // its not enabled so just return false. In fact, its not even present!</span> |
| <span class="source-line-no">452</span><span id="line-452"> if (entry == null) {</span> |
| <span class="source-line-no">453</span><span id="line-453"> return false;</span> |
| <span class="source-line-no">454</span><span id="line-454"> }</span> |
| <span class="source-line-no">455</span><span id="line-455"></span> |
| <span class="source-line-no">456</span><span id="line-456"> // get the info about the constraint</span> |
| <span class="source-line-no">457</span><span id="line-457"> Configuration conf = readConfiguration(entry.getSecond());</span> |
| <span class="source-line-no">458</span><span id="line-458"></span> |
| <span class="source-line-no">459</span><span id="line-459"> return conf.getBoolean(ENABLED_KEY, false);</span> |
| <span class="source-line-no">460</span><span id="line-460"> }</span> |
| <span class="source-line-no">461</span><span id="line-461"></span> |
| <span class="source-line-no">462</span><span id="line-462"> /**</span> |
| <span class="source-line-no">463</span><span id="line-463"> * Get the constraints stored in the table descriptor</span> |
| <span class="source-line-no">464</span><span id="line-464"> * @param desc To read from</span> |
| <span class="source-line-no">465</span><span id="line-465"> * @param classloader To use when loading classes. If a special classloader is used on a region,</span> |
| <span class="source-line-no">466</span><span id="line-466"> * for instance, then that should be the classloader used to load the</span> |
| <span class="source-line-no">467</span><span id="line-467"> * constraints. This could also apply to unit-testing situation, where want to</span> |
| <span class="source-line-no">468</span><span id="line-468"> * ensure that class is reloaded or not.</span> |
| <span class="source-line-no">469</span><span id="line-469"> * @return List of configured {@link Constraint Constraints}</span> |
| <span class="source-line-no">470</span><span id="line-470"> * @throws IOException if any part of reading/arguments fails</span> |
| <span class="source-line-no">471</span><span id="line-471"> */</span> |
| <span class="source-line-no">472</span><span id="line-472"> static List<? extends Constraint> getConstraints(TableDescriptor desc, ClassLoader classloader)</span> |
| <span class="source-line-no">473</span><span id="line-473"> throws IOException {</span> |
| <span class="source-line-no">474</span><span id="line-474"> List<Constraint> constraints = new ArrayList<>();</span> |
| <span class="source-line-no">475</span><span id="line-475"> // loop through all the key, values looking for constraints</span> |
| <span class="source-line-no">476</span><span id="line-476"> for (Map.Entry<Bytes, Bytes> e : desc.getValues().entrySet()) {</span> |
| <span class="source-line-no">477</span><span id="line-477"> // read out the constraint</span> |
| <span class="source-line-no">478</span><span id="line-478"> String key = Bytes.toString(e.getKey().get()).trim();</span> |
| <span class="source-line-no">479</span><span id="line-479"> String[] className = CONSTRAINT_HTD_ATTR_KEY_PATTERN.split(key);</span> |
| <span class="source-line-no">480</span><span id="line-480"> if (className.length == 2) {</span> |
| <span class="source-line-no">481</span><span id="line-481"> key = className[1];</span> |
| <span class="source-line-no">482</span><span id="line-482"> if (LOG.isDebugEnabled()) {</span> |
| <span class="source-line-no">483</span><span id="line-483"> LOG.debug("Loading constraint:" + key);</span> |
| <span class="source-line-no">484</span><span id="line-484"> }</span> |
| <span class="source-line-no">485</span><span id="line-485"></span> |
| <span class="source-line-no">486</span><span id="line-486"> // read in the rest of the constraint</span> |
| <span class="source-line-no">487</span><span id="line-487"> Configuration conf;</span> |
| <span class="source-line-no">488</span><span id="line-488"> try {</span> |
| <span class="source-line-no">489</span><span id="line-489"> conf = readConfiguration(e.getValue().get());</span> |
| <span class="source-line-no">490</span><span id="line-490"> } catch (IOException e1) {</span> |
| <span class="source-line-no">491</span><span id="line-491"> // long that we don't have a valid configuration stored, and move on.</span> |
| <span class="source-line-no">492</span><span id="line-492"> LOG.warn("Corrupted configuration found for key:" + key + ", skipping it.");</span> |
| <span class="source-line-no">493</span><span id="line-493"> continue;</span> |
| <span class="source-line-no">494</span><span id="line-494"> }</span> |
| <span class="source-line-no">495</span><span id="line-495"> // if it is not enabled, skip it</span> |
| <span class="source-line-no">496</span><span id="line-496"> if (!conf.getBoolean(ENABLED_KEY, false)) {</span> |
| <span class="source-line-no">497</span><span id="line-497"> LOG.debug("Constraint: {} is DISABLED - skipping it", key);</span> |
| <span class="source-line-no">498</span><span id="line-498"> // go to the next constraint</span> |
| <span class="source-line-no">499</span><span id="line-499"> continue;</span> |
| <span class="source-line-no">500</span><span id="line-500"> }</span> |
| <span class="source-line-no">501</span><span id="line-501"></span> |
| <span class="source-line-no">502</span><span id="line-502"> try {</span> |
| <span class="source-line-no">503</span><span id="line-503"> // add the constraint, now that we expect it to be valid.</span> |
| <span class="source-line-no">504</span><span id="line-504"> Class<? extends Constraint> clazz =</span> |
| <span class="source-line-no">505</span><span id="line-505"> classloader.loadClass(key).asSubclass(Constraint.class);</span> |
| <span class="source-line-no">506</span><span id="line-506"> Constraint constraint = clazz.getDeclaredConstructor().newInstance();</span> |
| <span class="source-line-no">507</span><span id="line-507"> constraint.setConf(conf);</span> |
| <span class="source-line-no">508</span><span id="line-508"> constraints.add(constraint);</span> |
| <span class="source-line-no">509</span><span id="line-509"> } catch (InvocationTargetException | NoSuchMethodException | ClassNotFoundException</span> |
| <span class="source-line-no">510</span><span id="line-510"> | InstantiationException | IllegalAccessException e1) {</span> |
| <span class="source-line-no">511</span><span id="line-511"> throw new IOException(e1);</span> |
| <span class="source-line-no">512</span><span id="line-512"> }</span> |
| <span class="source-line-no">513</span><span id="line-513"> }</span> |
| <span class="source-line-no">514</span><span id="line-514"> }</span> |
| <span class="source-line-no">515</span><span id="line-515"> // sort them, based on the priorities</span> |
| <span class="source-line-no">516</span><span id="line-516"> Collections.sort(constraints, constraintComparator);</span> |
| <span class="source-line-no">517</span><span id="line-517"> return constraints;</span> |
| <span class="source-line-no">518</span><span id="line-518"> }</span> |
| <span class="source-line-no">519</span><span id="line-519"></span> |
| <span class="source-line-no">520</span><span id="line-520"> private static final Comparator<Constraint> constraintComparator = new Comparator<Constraint>() {</span> |
| <span class="source-line-no">521</span><span id="line-521"> @Override</span> |
| <span class="source-line-no">522</span><span id="line-522"> public int compare(Constraint c1, Constraint c2) {</span> |
| <span class="source-line-no">523</span><span id="line-523"> // compare the priorities of the constraints stored in their configuration</span> |
| <span class="source-line-no">524</span><span id="line-524"> return Long.compare(c1.getConf().getLong(PRIORITY_KEY, DEFAULT_PRIORITY),</span> |
| <span class="source-line-no">525</span><span id="line-525"> c2.getConf().getLong(PRIORITY_KEY, DEFAULT_PRIORITY));</span> |
| <span class="source-line-no">526</span><span id="line-526"> }</span> |
| <span class="source-line-no">527</span><span id="line-527"> };</span> |
| <span class="source-line-no">528</span><span id="line-528"></span> |
| <span class="source-line-no">529</span><span id="line-529">}</span> |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| </pre> |
| </div> |
| </main> |
| </body> |
| </html> |
