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