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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.namespace;</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.util.HashMap;</span> |
| <span class="source-line-no">021</span><span id="line-21">import java.util.Map;</span> |
| <span class="source-line-no">022</span><span id="line-22">import java.util.Map.Entry;</span> |
| <span class="source-line-no">023</span><span id="line-23">import java.util.Set;</span> |
| <span class="source-line-no">024</span><span id="line-24">import java.util.concurrent.atomic.AtomicInteger;</span> |
| <span class="source-line-no">025</span><span id="line-25">import org.apache.hadoop.hbase.TableName;</span> |
| <span class="source-line-no">026</span><span id="line-26">import org.apache.yetus.audience.InterfaceAudience;</span> |
| <span class="source-line-no">027</span><span id="line-27"></span> |
| <span class="source-line-no">028</span><span id="line-28">import org.apache.hbase.thirdparty.com.google.common.base.Joiner;</span> |
| <span class="source-line-no">029</span><span id="line-29"></span> |
| <span class="source-line-no">030</span><span id="line-30">/**</span> |
| <span class="source-line-no">031</span><span id="line-31"> * NamespaceTableAndRegionInfo is a helper class that contains information about current state of</span> |
| <span class="source-line-no">032</span><span id="line-32"> * tables and regions in a namespace.</span> |
| <span class="source-line-no">033</span><span id="line-33"> */</span> |
| <span class="source-line-no">034</span><span id="line-34">@InterfaceAudience.Private</span> |
| <span class="source-line-no">035</span><span id="line-35">class NamespaceTableAndRegionInfo {</span> |
| <span class="source-line-no">036</span><span id="line-36"> private String name;</span> |
| <span class="source-line-no">037</span><span id="line-37"> private Map<TableName, AtomicInteger> tableAndRegionInfo;</span> |
| <span class="source-line-no">038</span><span id="line-38"></span> |
| <span class="source-line-no">039</span><span id="line-39"> public NamespaceTableAndRegionInfo(String namespace) {</span> |
| <span class="source-line-no">040</span><span id="line-40"> this.name = namespace;</span> |
| <span class="source-line-no">041</span><span id="line-41"> this.tableAndRegionInfo = new HashMap<>();</span> |
| <span class="source-line-no">042</span><span id="line-42"> }</span> |
| <span class="source-line-no">043</span><span id="line-43"></span> |
| <span class="source-line-no">044</span><span id="line-44"> /**</span> |
| <span class="source-line-no">045</span><span id="line-45"> * Gets the name of the namespace.</span> |
| <span class="source-line-no">046</span><span id="line-46"> * @return name of the namespace.</span> |
| <span class="source-line-no">047</span><span id="line-47"> */</span> |
| <span class="source-line-no">048</span><span id="line-48"> String getName() {</span> |
| <span class="source-line-no">049</span><span id="line-49"> return name;</span> |
| <span class="source-line-no">050</span><span id="line-50"> }</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"> * Gets the set of table names belonging to namespace.</span> |
| <span class="source-line-no">054</span><span id="line-54"> * @return A set of table names.</span> |
| <span class="source-line-no">055</span><span id="line-55"> */</span> |
| <span class="source-line-no">056</span><span id="line-56"> synchronized Set<TableName> getTables() {</span> |
| <span class="source-line-no">057</span><span id="line-57"> return this.tableAndRegionInfo.keySet();</span> |
| <span class="source-line-no">058</span><span id="line-58"> }</span> |
| <span class="source-line-no">059</span><span id="line-59"></span> |
| <span class="source-line-no">060</span><span id="line-60"> /**</span> |
| <span class="source-line-no">061</span><span id="line-61"> * Gets the total number of regions in namespace.</span> |
| <span class="source-line-no">062</span><span id="line-62"> * @return the region count</span> |
| <span class="source-line-no">063</span><span id="line-63"> */</span> |
| <span class="source-line-no">064</span><span id="line-64"> synchronized int getRegionCount() {</span> |
| <span class="source-line-no">065</span><span id="line-65"> int regionCount = 0;</span> |
| <span class="source-line-no">066</span><span id="line-66"> for (Entry<TableName, AtomicInteger> entry : this.tableAndRegionInfo.entrySet()) {</span> |
| <span class="source-line-no">067</span><span id="line-67"> regionCount = regionCount + entry.getValue().get();</span> |
| <span class="source-line-no">068</span><span id="line-68"> }</span> |
| <span class="source-line-no">069</span><span id="line-69"> return regionCount;</span> |
| <span class="source-line-no">070</span><span id="line-70"> }</span> |
| <span class="source-line-no">071</span><span id="line-71"></span> |
| <span class="source-line-no">072</span><span id="line-72"> synchronized int getRegionCountOfTable(TableName tableName) {</span> |
| <span class="source-line-no">073</span><span id="line-73"> if (tableAndRegionInfo.containsKey(tableName)) {</span> |
| <span class="source-line-no">074</span><span id="line-74"> return this.tableAndRegionInfo.get(tableName).get();</span> |
| <span class="source-line-no">075</span><span id="line-75"> } else {</span> |
| <span class="source-line-no">076</span><span id="line-76"> return -1;</span> |
| <span class="source-line-no">077</span><span id="line-77"> }</span> |
| <span class="source-line-no">078</span><span id="line-78"> }</span> |
| <span class="source-line-no">079</span><span id="line-79"></span> |
| <span class="source-line-no">080</span><span id="line-80"> synchronized boolean containsTable(TableName tableName) {</span> |
| <span class="source-line-no">081</span><span id="line-81"> return this.tableAndRegionInfo.containsKey(tableName);</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"> synchronized void addTable(TableName tableName, int regionCount) {</span> |
| <span class="source-line-no">085</span><span id="line-85"> if (!name.equalsIgnoreCase(tableName.getNamespaceAsString())) {</span> |
| <span class="source-line-no">086</span><span id="line-86"> throw new IllegalStateException(</span> |
| <span class="source-line-no">087</span><span id="line-87"> "Table : " + tableName + " does not belong to namespace " + name);</span> |
| <span class="source-line-no">088</span><span id="line-88"> }</span> |
| <span class="source-line-no">089</span><span id="line-89"> if (!tableAndRegionInfo.containsKey(tableName)) {</span> |
| <span class="source-line-no">090</span><span id="line-90"> tableAndRegionInfo.put(tableName, new AtomicInteger(regionCount));</span> |
| <span class="source-line-no">091</span><span id="line-91"> } else {</span> |
| <span class="source-line-no">092</span><span id="line-92"> throw new IllegalStateException("Table already in the cache " + tableName);</span> |
| <span class="source-line-no">093</span><span id="line-93"> }</span> |
| <span class="source-line-no">094</span><span id="line-94"> }</span> |
| <span class="source-line-no">095</span><span id="line-95"></span> |
| <span class="source-line-no">096</span><span id="line-96"> synchronized void removeTable(TableName tableName) {</span> |
| <span class="source-line-no">097</span><span id="line-97"> tableAndRegionInfo.remove(tableName);</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"> synchronized int incRegionCountForTable(TableName tableName, int count) {</span> |
| <span class="source-line-no">101</span><span id="line-101"> return tableAndRegionInfo.get(tableName).addAndGet(count);</span> |
| <span class="source-line-no">102</span><span id="line-102"> }</span> |
| <span class="source-line-no">103</span><span id="line-103"></span> |
| <span class="source-line-no">104</span><span id="line-104"> synchronized int decrementRegionCountForTable(TableName tableName, int count) {</span> |
| <span class="source-line-no">105</span><span id="line-105"> return tableAndRegionInfo.get(tableName).decrementAndGet();</span> |
| <span class="source-line-no">106</span><span id="line-106"> }</span> |
| <span class="source-line-no">107</span><span id="line-107"></span> |
| <span class="source-line-no">108</span><span id="line-108"> @Override</span> |
| <span class="source-line-no">109</span><span id="line-109"> public String toString() {</span> |
| <span class="source-line-no">110</span><span id="line-110"> Joiner.MapJoiner mapJoiner = Joiner.on(',').withKeyValueSeparator("=");</span> |
| <span class="source-line-no">111</span><span id="line-111"> return "NamespaceTableAndRegionInfo [name=" + name + ", tableAndRegionInfo="</span> |
| <span class="source-line-no">112</span><span id="line-112"> + mapJoiner.join(tableAndRegionInfo) + "]";</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> |
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| </pre> |
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