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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 java.util.NoSuchElementException;</span> |
| <span class="source-line-no">023</span><span id="line-23">import org.apache.hadoop.hbase.Cell;</span> |
| <span class="source-line-no">024</span><span id="line-24">import org.apache.hadoop.hbase.CellUtil;</span> |
| <span class="source-line-no">025</span><span id="line-25">import org.apache.hadoop.hbase.DoNotRetryIOException;</span> |
| <span class="source-line-no">026</span><span id="line-26">import org.apache.hadoop.hbase.client.Get;</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.Table;</span> |
| <span class="source-line-no">029</span><span id="line-29">import org.apache.hadoop.hbase.filter.Filter;</span> |
| <span class="source-line-no">030</span><span id="line-30">import org.apache.hadoop.hbase.security.AccessDeniedException;</span> |
| <span class="source-line-no">031</span><span id="line-31">import org.apache.hadoop.util.StringUtils;</span> |
| <span class="source-line-no">032</span><span id="line-32">import org.apache.yetus.audience.InterfaceAudience;</span> |
| <span class="source-line-no">033</span><span id="line-33">import org.slf4j.Logger;</span> |
| <span class="source-line-no">034</span><span id="line-34">import org.slf4j.LoggerFactory;</span> |
| <span class="source-line-no">035</span><span id="line-35"></span> |
| <span class="source-line-no">036</span><span id="line-36">@InterfaceAudience.Private</span> |
| <span class="source-line-no">037</span><span id="line-37">public class RowResultGenerator extends ResultGenerator {</span> |
| <span class="source-line-no">038</span><span id="line-38"> private static final Logger LOG = LoggerFactory.getLogger(RowResultGenerator.class);</span> |
| <span class="source-line-no">039</span><span id="line-39"></span> |
| <span class="source-line-no">040</span><span id="line-40"> private Iterator<Cell> valuesI;</span> |
| <span class="source-line-no">041</span><span id="line-41"> private Cell cache;</span> |
| <span class="source-line-no">042</span><span id="line-42"></span> |
| <span class="source-line-no">043</span><span id="line-43"> public RowResultGenerator(final String tableName, final RowSpec rowspec, final Filter filter,</span> |
| <span class="source-line-no">044</span><span id="line-44"> final boolean cacheBlocks) throws IllegalArgumentException, IOException {</span> |
| <span class="source-line-no">045</span><span id="line-45"> try (Table table = RESTServlet.getInstance().getTable(tableName)) {</span> |
| <span class="source-line-no">046</span><span id="line-46"> Get get = new Get(rowspec.getRow());</span> |
| <span class="source-line-no">047</span><span id="line-47"> if (rowspec.hasColumns()) {</span> |
| <span class="source-line-no">048</span><span id="line-48"> for (byte[] col : rowspec.getColumns()) {</span> |
| <span class="source-line-no">049</span><span id="line-49"> byte[][] split = CellUtil.parseColumn(col);</span> |
| <span class="source-line-no">050</span><span id="line-50"> if (split.length == 1) {</span> |
| <span class="source-line-no">051</span><span id="line-51"> get.addFamily(split[0]);</span> |
| <span class="source-line-no">052</span><span id="line-52"> } else if (split.length == 2) {</span> |
| <span class="source-line-no">053</span><span id="line-53"> get.addColumn(split[0], split[1]);</span> |
| <span class="source-line-no">054</span><span id="line-54"> } else {</span> |
| <span class="source-line-no">055</span><span id="line-55"> throw new IllegalArgumentException("Invalid column specifier.");</span> |
| <span class="source-line-no">056</span><span id="line-56"> }</span> |
| <span class="source-line-no">057</span><span id="line-57"> }</span> |
| <span class="source-line-no">058</span><span id="line-58"> }</span> |
| <span class="source-line-no">059</span><span id="line-59"> get.setTimeRange(rowspec.getStartTime(), rowspec.getEndTime());</span> |
| <span class="source-line-no">060</span><span id="line-60"> get.readVersions(rowspec.getMaxVersions());</span> |
| <span class="source-line-no">061</span><span id="line-61"> if (filter != null) {</span> |
| <span class="source-line-no">062</span><span id="line-62"> get.setFilter(filter);</span> |
| <span class="source-line-no">063</span><span id="line-63"> }</span> |
| <span class="source-line-no">064</span><span id="line-64"> get.setCacheBlocks(cacheBlocks);</span> |
| <span class="source-line-no">065</span><span id="line-65"> Result result = table.get(get);</span> |
| <span class="source-line-no">066</span><span id="line-66"> if (result != null && !result.isEmpty()) {</span> |
| <span class="source-line-no">067</span><span id="line-67"> valuesI = result.listCells().iterator();</span> |
| <span class="source-line-no">068</span><span id="line-68"> }</span> |
| <span class="source-line-no">069</span><span id="line-69"> } catch (DoNotRetryIOException e) {</span> |
| <span class="source-line-no">070</span><span id="line-70"> // Warn here because Stargate will return 404 in the case if multiple</span> |
| <span class="source-line-no">071</span><span id="line-71"> // column families were specified but one did not exist -- currently</span> |
| <span class="source-line-no">072</span><span id="line-72"> // HBase will fail the whole Get.</span> |
| <span class="source-line-no">073</span><span id="line-73"> // Specifying multiple columns in a URI should be uncommon usage but</span> |
| <span class="source-line-no">074</span><span id="line-74"> // help to avoid confusion by leaving a record of what happened here in</span> |
| <span class="source-line-no">075</span><span id="line-75"> // the log.</span> |
| <span class="source-line-no">076</span><span id="line-76"> LOG.warn(StringUtils.stringifyException(e));</span> |
| <span class="source-line-no">077</span><span id="line-77"> // Lets get the exception rethrown to get a more meaningful error message than 404</span> |
| <span class="source-line-no">078</span><span id="line-78"> if (e instanceof AccessDeniedException) {</span> |
| <span class="source-line-no">079</span><span id="line-79"> throw e;</span> |
| <span class="source-line-no">080</span><span id="line-80"> }</span> |
| <span class="source-line-no">081</span><span id="line-81"> }</span> |
| <span class="source-line-no">082</span><span id="line-82"> }</span> |
| <span class="source-line-no">083</span><span id="line-83"></span> |
| <span class="source-line-no">084</span><span id="line-84"> @Override</span> |
| <span class="source-line-no">085</span><span id="line-85"> public void close() {</span> |
| <span class="source-line-no">086</span><span id="line-86"> }</span> |
| <span class="source-line-no">087</span><span id="line-87"></span> |
| <span class="source-line-no">088</span><span id="line-88"> @Override</span> |
| <span class="source-line-no">089</span><span id="line-89"> public boolean hasNext() {</span> |
| <span class="source-line-no">090</span><span id="line-90"> if (cache != null) {</span> |
| <span class="source-line-no">091</span><span id="line-91"> return true;</span> |
| <span class="source-line-no">092</span><span id="line-92"> }</span> |
| <span class="source-line-no">093</span><span id="line-93"> if (valuesI == null) {</span> |
| <span class="source-line-no">094</span><span id="line-94"> return false;</span> |
| <span class="source-line-no">095</span><span id="line-95"> }</span> |
| <span class="source-line-no">096</span><span id="line-96"> return valuesI.hasNext();</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"> @Override</span> |
| <span class="source-line-no">100</span><span id="line-100"> public Cell next() {</span> |
| <span class="source-line-no">101</span><span id="line-101"> if (cache != null) {</span> |
| <span class="source-line-no">102</span><span id="line-102"> Cell kv = cache;</span> |
| <span class="source-line-no">103</span><span id="line-103"> cache = null;</span> |
| <span class="source-line-no">104</span><span id="line-104"> return kv;</span> |
| <span class="source-line-no">105</span><span id="line-105"> }</span> |
| <span class="source-line-no">106</span><span id="line-106"> if (valuesI == null) {</span> |
| <span class="source-line-no">107</span><span id="line-107"> return null;</span> |
| <span class="source-line-no">108</span><span id="line-108"> }</span> |
| <span class="source-line-no">109</span><span id="line-109"> try {</span> |
| <span class="source-line-no">110</span><span id="line-110"> return valuesI.next();</span> |
| <span class="source-line-no">111</span><span id="line-111"> } catch (NoSuchElementException e) {</span> |
| <span class="source-line-no">112</span><span id="line-112"> return null;</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"> @Override</span> |
| <span class="source-line-no">117</span><span id="line-117"> public void putBack(Cell kv) {</span> |
| <span class="source-line-no">118</span><span id="line-118"> this.cache = kv;</span> |
| <span class="source-line-no">119</span><span id="line-119"> }</span> |
| <span class="source-line-no">120</span><span id="line-120"></span> |
| <span class="source-line-no">121</span><span id="line-121"> @Override</span> |
| <span class="source-line-no">122</span><span id="line-122"> public void remove() {</span> |
| <span class="source-line-no">123</span><span id="line-123"> throw new UnsupportedOperationException("remove not supported");</span> |
| <span class="source-line-no">124</span><span id="line-124"> }</span> |
| <span class="source-line-no">125</span><span id="line-125">}</span> |
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| </pre> |
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