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| <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.rest;</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.IOException;</span> |
| <span class="source-line-no">021</span><span id="line-21">import java.util.Iterator;</span> |
| <span class="source-line-no">022</span><span id="line-22">import org.apache.hadoop.hbase.Cell;</span> |
| <span class="source-line-no">023</span><span id="line-23">import org.apache.hadoop.hbase.CellUtil;</span> |
| <span class="source-line-no">024</span><span id="line-24">import org.apache.hadoop.hbase.TableNotEnabledException;</span> |
| <span class="source-line-no">025</span><span id="line-25">import org.apache.hadoop.hbase.TableNotFoundException;</span> |
| <span class="source-line-no">026</span><span id="line-26">import org.apache.hadoop.hbase.UnknownScannerException;</span> |
| <span class="source-line-no">027</span><span id="line-27">import org.apache.hadoop.hbase.client.Result;</span> |
| <span class="source-line-no">028</span><span id="line-28">import org.apache.hadoop.hbase.client.ResultScanner;</span> |
| <span class="source-line-no">029</span><span id="line-29">import org.apache.hadoop.hbase.client.Scan;</span> |
| <span class="source-line-no">030</span><span id="line-30">import org.apache.hadoop.hbase.client.Table;</span> |
| <span class="source-line-no">031</span><span id="line-31">import org.apache.hadoop.hbase.filter.Filter;</span> |
| <span class="source-line-no">032</span><span id="line-32">import org.apache.hadoop.hbase.rest.model.ScannerModel;</span> |
| <span class="source-line-no">033</span><span id="line-33">import org.apache.hadoop.hbase.security.visibility.Authorizations;</span> |
| <span class="source-line-no">034</span><span id="line-34">import org.apache.hadoop.hbase.util.EnvironmentEdgeManager;</span> |
| <span class="source-line-no">035</span><span id="line-35">import org.apache.hadoop.util.StringUtils;</span> |
| <span class="source-line-no">036</span><span id="line-36">import org.apache.yetus.audience.InterfaceAudience;</span> |
| <span class="source-line-no">037</span><span id="line-37">import org.slf4j.Logger;</span> |
| <span class="source-line-no">038</span><span id="line-38">import org.slf4j.LoggerFactory;</span> |
| <span class="source-line-no">039</span><span id="line-39"></span> |
| <span class="source-line-no">040</span><span id="line-40">@InterfaceAudience.Private</span> |
| <span class="source-line-no">041</span><span id="line-41">public class ScannerResultGenerator extends ResultGenerator {</span> |
| <span class="source-line-no">042</span><span id="line-42"></span> |
| <span class="source-line-no">043</span><span id="line-43"> private static final Logger LOG = LoggerFactory.getLogger(ScannerResultGenerator.class);</span> |
| <span class="source-line-no">044</span><span id="line-44"></span> |
| <span class="source-line-no">045</span><span id="line-45"> public static Filter buildFilterFromModel(final ScannerModel model) throws Exception {</span> |
| <span class="source-line-no">046</span><span id="line-46"> String filter = model.getFilter();</span> |
| <span class="source-line-no">047</span><span id="line-47"> if (filter == null || filter.length() == 0) {</span> |
| <span class="source-line-no">048</span><span id="line-48"> return null;</span> |
| <span class="source-line-no">049</span><span id="line-49"> }</span> |
| <span class="source-line-no">050</span><span id="line-50"> return buildFilter(filter);</span> |
| <span class="source-line-no">051</span><span id="line-51"> }</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 String id;</span> |
| <span class="source-line-no">054</span><span id="line-54"> private Iterator<Cell> rowI;</span> |
| <span class="source-line-no">055</span><span id="line-55"> private Cell cache;</span> |
| <span class="source-line-no">056</span><span id="line-56"> private ResultScanner scanner;</span> |
| <span class="source-line-no">057</span><span id="line-57"> private Result cached;</span> |
| <span class="source-line-no">058</span><span id="line-58"></span> |
| <span class="source-line-no">059</span><span id="line-59"> public ScannerResultGenerator(final String tableName, final RowSpec rowspec, final Filter filter,</span> |
| <span class="source-line-no">060</span><span id="line-60"> final boolean cacheBlocks) throws IllegalArgumentException, IOException {</span> |
| <span class="source-line-no">061</span><span id="line-61"> this(tableName, rowspec, filter, -1, cacheBlocks);</span> |
| <span class="source-line-no">062</span><span id="line-62"> }</span> |
| <span class="source-line-no">063</span><span id="line-63"></span> |
| <span class="source-line-no">064</span><span id="line-64"> public ScannerResultGenerator(final String tableName, final RowSpec rowspec, final Filter filter,</span> |
| <span class="source-line-no">065</span><span id="line-65"> final int caching, final boolean cacheBlocks) throws IllegalArgumentException, IOException {</span> |
| <span class="source-line-no">066</span><span id="line-66"> this(tableName, rowspec, filter, caching, cacheBlocks, -1);</span> |
| <span class="source-line-no">067</span><span id="line-67"> }</span> |
| <span class="source-line-no">068</span><span id="line-68"></span> |
| <span class="source-line-no">069</span><span id="line-69"> public ScannerResultGenerator(final String tableName, final RowSpec rowspec, final Filter filter,</span> |
| <span class="source-line-no">070</span><span id="line-70"> final int caching, final boolean cacheBlocks, int limit) throws IOException {</span> |
| <span class="source-line-no">071</span><span id="line-71"> Table table = RESTServlet.getInstance().getTable(tableName);</span> |
| <span class="source-line-no">072</span><span id="line-72"> try {</span> |
| <span class="source-line-no">073</span><span id="line-73"> Scan scan;</span> |
| <span class="source-line-no">074</span><span id="line-74"> if (rowspec.hasEndRow()) {</span> |
| <span class="source-line-no">075</span><span id="line-75"> scan = new Scan().withStartRow(rowspec.getStartRow()).withStopRow(rowspec.getEndRow());</span> |
| <span class="source-line-no">076</span><span id="line-76"> } else {</span> |
| <span class="source-line-no">077</span><span id="line-77"> scan = new Scan().withStartRow(rowspec.getStartRow());</span> |
| <span class="source-line-no">078</span><span id="line-78"> }</span> |
| <span class="source-line-no">079</span><span id="line-79"> if (rowspec.hasColumns()) {</span> |
| <span class="source-line-no">080</span><span id="line-80"> byte[][] columns = rowspec.getColumns();</span> |
| <span class="source-line-no">081</span><span id="line-81"> for (byte[] column : columns) {</span> |
| <span class="source-line-no">082</span><span id="line-82"> byte[][] split = CellUtil.parseColumn(column);</span> |
| <span class="source-line-no">083</span><span id="line-83"> if (split.length == 1) {</span> |
| <span class="source-line-no">084</span><span id="line-84"> scan.addFamily(split[0]);</span> |
| <span class="source-line-no">085</span><span id="line-85"> } else if (split.length == 2) {</span> |
| <span class="source-line-no">086</span><span id="line-86"> scan.addColumn(split[0], split[1]);</span> |
| <span class="source-line-no">087</span><span id="line-87"> } else {</span> |
| <span class="source-line-no">088</span><span id="line-88"> throw new IllegalArgumentException("Invalid familyAndQualifier provided.");</span> |
| <span class="source-line-no">089</span><span id="line-89"> }</span> |
| <span class="source-line-no">090</span><span id="line-90"> }</span> |
| <span class="source-line-no">091</span><span id="line-91"> }</span> |
| <span class="source-line-no">092</span><span id="line-92"> scan.setTimeRange(rowspec.getStartTime(), rowspec.getEndTime());</span> |
| <span class="source-line-no">093</span><span id="line-93"> scan.readVersions(rowspec.getMaxVersions());</span> |
| <span class="source-line-no">094</span><span id="line-94"> if (filter != null) {</span> |
| <span class="source-line-no">095</span><span id="line-95"> scan.setFilter(filter);</span> |
| <span class="source-line-no">096</span><span id="line-96"> }</span> |
| <span class="source-line-no">097</span><span id="line-97"> if (caching > 0) {</span> |
| <span class="source-line-no">098</span><span id="line-98"> scan.setCaching(caching);</span> |
| <span class="source-line-no">099</span><span id="line-99"> }</span> |
| <span class="source-line-no">100</span><span id="line-100"> if (limit > 0) {</span> |
| <span class="source-line-no">101</span><span id="line-101"> scan.setLimit(limit);</span> |
| <span class="source-line-no">102</span><span id="line-102"> }</span> |
| <span class="source-line-no">103</span><span id="line-103"> scan.setCacheBlocks(cacheBlocks);</span> |
| <span class="source-line-no">104</span><span id="line-104"> if (rowspec.hasLabels()) {</span> |
| <span class="source-line-no">105</span><span id="line-105"> scan.setAuthorizations(new Authorizations(rowspec.getLabels()));</span> |
| <span class="source-line-no">106</span><span id="line-106"> }</span> |
| <span class="source-line-no">107</span><span id="line-107"> scanner = table.getScanner(scan);</span> |
| <span class="source-line-no">108</span><span id="line-108"> cached = null;</span> |
| <span class="source-line-no">109</span><span id="line-109"> id = Long.toString(EnvironmentEdgeManager.currentTime())</span> |
| <span class="source-line-no">110</span><span id="line-110"> + Integer.toHexString(scanner.hashCode());</span> |
| <span class="source-line-no">111</span><span id="line-111"> } finally {</span> |
| <span class="source-line-no">112</span><span id="line-112"> table.close();</span> |
| <span class="source-line-no">113</span><span id="line-113"> }</span> |
| <span class="source-line-no">114</span><span id="line-114"> }</span> |
| <span class="source-line-no">115</span><span id="line-115"></span> |
| <span class="source-line-no">116</span><span id="line-116"> public String getID() {</span> |
| <span class="source-line-no">117</span><span id="line-117"> return id;</span> |
| <span class="source-line-no">118</span><span id="line-118"> }</span> |
| <span class="source-line-no">119</span><span id="line-119"></span> |
| <span class="source-line-no">120</span><span id="line-120"> @Override</span> |
| <span class="source-line-no">121</span><span id="line-121"> public void close() {</span> |
| <span class="source-line-no">122</span><span id="line-122"> if (scanner != null) {</span> |
| <span class="source-line-no">123</span><span id="line-123"> scanner.close();</span> |
| <span class="source-line-no">124</span><span id="line-124"> scanner = null;</span> |
| <span class="source-line-no">125</span><span id="line-125"> }</span> |
| <span class="source-line-no">126</span><span id="line-126"> }</span> |
| <span class="source-line-no">127</span><span id="line-127"></span> |
| <span class="source-line-no">128</span><span id="line-128"> @Override</span> |
| <span class="source-line-no">129</span><span id="line-129"> public boolean hasNext() {</span> |
| <span class="source-line-no">130</span><span id="line-130"> if (cache != null) {</span> |
| <span class="source-line-no">131</span><span id="line-131"> return true;</span> |
| <span class="source-line-no">132</span><span id="line-132"> }</span> |
| <span class="source-line-no">133</span><span id="line-133"> if (rowI != null && rowI.hasNext()) {</span> |
| <span class="source-line-no">134</span><span id="line-134"> return true;</span> |
| <span class="source-line-no">135</span><span id="line-135"> }</span> |
| <span class="source-line-no">136</span><span id="line-136"> if (cached != null) {</span> |
| <span class="source-line-no">137</span><span id="line-137"> return true;</span> |
| <span class="source-line-no">138</span><span id="line-138"> }</span> |
| <span class="source-line-no">139</span><span id="line-139"> try {</span> |
| <span class="source-line-no">140</span><span id="line-140"> Result result = scanner.next();</span> |
| <span class="source-line-no">141</span><span id="line-141"> if (result != null && !result.isEmpty()) {</span> |
| <span class="source-line-no">142</span><span id="line-142"> cached = result;</span> |
| <span class="source-line-no">143</span><span id="line-143"> }</span> |
| <span class="source-line-no">144</span><span id="line-144"> } catch (UnknownScannerException e) {</span> |
| <span class="source-line-no">145</span><span id="line-145"> throw new IllegalArgumentException(e);</span> |
| <span class="source-line-no">146</span><span id="line-146"> } catch (IOException e) {</span> |
| <span class="source-line-no">147</span><span id="line-147"> LOG.error(StringUtils.stringifyException(e));</span> |
| <span class="source-line-no">148</span><span id="line-148"> }</span> |
| <span class="source-line-no">149</span><span id="line-149"> return cached != null;</span> |
| <span class="source-line-no">150</span><span id="line-150"> }</span> |
| <span class="source-line-no">151</span><span id="line-151"></span> |
| <span class="source-line-no">152</span><span id="line-152"> @Override</span> |
| <span class="source-line-no">153</span><span id="line-153"> public Cell next() {</span> |
| <span class="source-line-no">154</span><span id="line-154"> if (cache != null) {</span> |
| <span class="source-line-no">155</span><span id="line-155"> Cell kv = cache;</span> |
| <span class="source-line-no">156</span><span id="line-156"> cache = null;</span> |
| <span class="source-line-no">157</span><span id="line-157"> return kv;</span> |
| <span class="source-line-no">158</span><span id="line-158"> }</span> |
| <span class="source-line-no">159</span><span id="line-159"> boolean loop;</span> |
| <span class="source-line-no">160</span><span id="line-160"> do {</span> |
| <span class="source-line-no">161</span><span id="line-161"> loop = false;</span> |
| <span class="source-line-no">162</span><span id="line-162"> if (rowI != null) {</span> |
| <span class="source-line-no">163</span><span id="line-163"> if (rowI.hasNext()) {</span> |
| <span class="source-line-no">164</span><span id="line-164"> return rowI.next();</span> |
| <span class="source-line-no">165</span><span id="line-165"> } else {</span> |
| <span class="source-line-no">166</span><span id="line-166"> rowI = null;</span> |
| <span class="source-line-no">167</span><span id="line-167"> }</span> |
| <span class="source-line-no">168</span><span id="line-168"> }</span> |
| <span class="source-line-no">169</span><span id="line-169"> if (cached != null) {</span> |
| <span class="source-line-no">170</span><span id="line-170"> rowI = cached.listCells().iterator();</span> |
| <span class="source-line-no">171</span><span id="line-171"> loop = true;</span> |
| <span class="source-line-no">172</span><span id="line-172"> cached = null;</span> |
| <span class="source-line-no">173</span><span id="line-173"> } else {</span> |
| <span class="source-line-no">174</span><span id="line-174"> Result result = null;</span> |
| <span class="source-line-no">175</span><span id="line-175"> try {</span> |
| <span class="source-line-no">176</span><span id="line-176"> result = scanner.next();</span> |
| <span class="source-line-no">177</span><span id="line-177"> } catch (UnknownScannerException e) {</span> |
| <span class="source-line-no">178</span><span id="line-178"> throw new IllegalArgumentException(e);</span> |
| <span class="source-line-no">179</span><span id="line-179"> } catch (TableNotEnabledException tnee) {</span> |
| <span class="source-line-no">180</span><span id="line-180"> throw new IllegalStateException(tnee);</span> |
| <span class="source-line-no">181</span><span id="line-181"> } catch (TableNotFoundException tnfe) {</span> |
| <span class="source-line-no">182</span><span id="line-182"> throw new IllegalArgumentException(tnfe);</span> |
| <span class="source-line-no">183</span><span id="line-183"> } catch (IOException e) {</span> |
| <span class="source-line-no">184</span><span id="line-184"> LOG.error(StringUtils.stringifyException(e));</span> |
| <span class="source-line-no">185</span><span id="line-185"> }</span> |
| <span class="source-line-no">186</span><span id="line-186"> if (result != null && !result.isEmpty()) {</span> |
| <span class="source-line-no">187</span><span id="line-187"> rowI = result.listCells().iterator();</span> |
| <span class="source-line-no">188</span><span id="line-188"> loop = true;</span> |
| <span class="source-line-no">189</span><span id="line-189"> }</span> |
| <span class="source-line-no">190</span><span id="line-190"> }</span> |
| <span class="source-line-no">191</span><span id="line-191"> } while (loop);</span> |
| <span class="source-line-no">192</span><span id="line-192"> return null;</span> |
| <span class="source-line-no">193</span><span id="line-193"> }</span> |
| <span class="source-line-no">194</span><span id="line-194"></span> |
| <span class="source-line-no">195</span><span id="line-195"> @Override</span> |
| <span class="source-line-no">196</span><span id="line-196"> public void putBack(Cell kv) {</span> |
| <span class="source-line-no">197</span><span id="line-197"> this.cache = kv;</span> |
| <span class="source-line-no">198</span><span id="line-198"> }</span> |
| <span class="source-line-no">199</span><span id="line-199"></span> |
| <span class="source-line-no">200</span><span id="line-200"> @Override</span> |
| <span class="source-line-no">201</span><span id="line-201"> public void remove() {</span> |
| <span class="source-line-no">202</span><span id="line-202"> throw new UnsupportedOperationException("remove not supported");</span> |
| <span class="source-line-no">203</span><span id="line-203"> }</span> |
| <span class="source-line-no">204</span><span id="line-204">}</span> |
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| </pre> |
| </div> |
| </main> |
| </body> |
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