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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><a name="line.18"></a> |
| <span class="sourceLineNo">019</span>package org.apache.hadoop.hbase.zookeeper;<a name="line.19"></a> |
| <span class="sourceLineNo">020</span><a name="line.20"></a> |
| <span class="sourceLineNo">021</span>import java.io.IOException;<a name="line.21"></a> |
| <span class="sourceLineNo">022</span><a name="line.22"></a> |
| <span class="sourceLineNo">023</span>import org.apache.hadoop.hbase.Abortable;<a name="line.23"></a> |
| <span class="sourceLineNo">024</span>import org.apache.hadoop.hbase.exceptions.DeserializationException;<a name="line.24"></a> |
| <span class="sourceLineNo">025</span>import org.apache.hadoop.hbase.util.Bytes;<a name="line.25"></a> |
| <span class="sourceLineNo">026</span>import org.apache.yetus.audience.InterfaceAudience;<a name="line.26"></a> |
| <span class="sourceLineNo">027</span>import org.apache.zookeeper.KeeperException;<a name="line.27"></a> |
| <span class="sourceLineNo">028</span><a name="line.28"></a> |
| <span class="sourceLineNo">029</span>import org.apache.hadoop.hbase.shaded.protobuf.ProtobufUtil;<a name="line.29"></a> |
| <span class="sourceLineNo">030</span>import org.apache.hadoop.hbase.shaded.protobuf.generated.SnapshotCleanupProtos;<a name="line.30"></a> |
| <span class="sourceLineNo">031</span><a name="line.31"></a> |
| <span class="sourceLineNo">032</span>/**<a name="line.32"></a> |
| <span class="sourceLineNo">033</span> * Tracks status of snapshot auto cleanup based on TTL<a name="line.33"></a> |
| <span class="sourceLineNo">034</span> */<a name="line.34"></a> |
| <span class="sourceLineNo">035</span>@InterfaceAudience.Private<a name="line.35"></a> |
| <span class="sourceLineNo">036</span>public class SnapshotCleanupTracker extends ZKNodeTracker {<a name="line.36"></a> |
| <span class="sourceLineNo">037</span><a name="line.37"></a> |
| <span class="sourceLineNo">038</span> /**<a name="line.38"></a> |
| <span class="sourceLineNo">039</span> * Constructs a new ZK node tracker.<a name="line.39"></a> |
| <span class="sourceLineNo">040</span> *<a name="line.40"></a> |
| <span class="sourceLineNo">041</span> * <p>After construction, use {@link #start} to kick off tracking.<a name="line.41"></a> |
| <span class="sourceLineNo">042</span> *<a name="line.42"></a> |
| <span class="sourceLineNo">043</span> * @param watcher reference to the {@link ZKWatcher} which also contains configuration and<a name="line.43"></a> |
| <span class="sourceLineNo">044</span> * constants<a name="line.44"></a> |
| <span class="sourceLineNo">045</span> * @param abortable used to abort if a fatal error occurs<a name="line.45"></a> |
| <span class="sourceLineNo">046</span> */<a name="line.46"></a> |
| <span class="sourceLineNo">047</span> public SnapshotCleanupTracker(ZKWatcher watcher, Abortable abortable) {<a name="line.47"></a> |
| <span class="sourceLineNo">048</span> super(watcher, watcher.getZNodePaths().snapshotCleanupZNode, abortable);<a name="line.48"></a> |
| <span class="sourceLineNo">049</span> }<a name="line.49"></a> |
| <span class="sourceLineNo">050</span><a name="line.50"></a> |
| <span class="sourceLineNo">051</span> /**<a name="line.51"></a> |
| <span class="sourceLineNo">052</span> * Returns the current state of the snapshot auto cleanup based on TTL<a name="line.52"></a> |
| <span class="sourceLineNo">053</span> *<a name="line.53"></a> |
| <span class="sourceLineNo">054</span> * @return <code>true</code> if the snapshot auto cleanup is enabled,<a name="line.54"></a> |
| <span class="sourceLineNo">055</span> * <code>false</code> otherwise.<a name="line.55"></a> |
| <span class="sourceLineNo">056</span> */<a name="line.56"></a> |
| <span class="sourceLineNo">057</span> public boolean isSnapshotCleanupEnabled() {<a name="line.57"></a> |
| <span class="sourceLineNo">058</span> byte[] snapshotCleanupZNodeData = super.getData(false);<a name="line.58"></a> |
| <span class="sourceLineNo">059</span> try {<a name="line.59"></a> |
| <span class="sourceLineNo">060</span> // if data in ZK is null, use default of on.<a name="line.60"></a> |
| <span class="sourceLineNo">061</span> return snapshotCleanupZNodeData == null ||<a name="line.61"></a> |
| <span class="sourceLineNo">062</span> parseFrom(snapshotCleanupZNodeData).getSnapshotCleanupEnabled();<a name="line.62"></a> |
| <span class="sourceLineNo">063</span> } catch (DeserializationException dex) {<a name="line.63"></a> |
| <span class="sourceLineNo">064</span> LOG.error("ZK state for Snapshot Cleanup could not be parsed " +<a name="line.64"></a> |
| <span class="sourceLineNo">065</span> Bytes.toStringBinary(snapshotCleanupZNodeData), dex);<a name="line.65"></a> |
| <span class="sourceLineNo">066</span> // return false to be safe.<a name="line.66"></a> |
| <span class="sourceLineNo">067</span> return false;<a name="line.67"></a> |
| <span class="sourceLineNo">068</span> }<a name="line.68"></a> |
| <span class="sourceLineNo">069</span> }<a name="line.69"></a> |
| <span class="sourceLineNo">070</span><a name="line.70"></a> |
| <span class="sourceLineNo">071</span> /**<a name="line.71"></a> |
| <span class="sourceLineNo">072</span> * Set snapshot auto clean on/off<a name="line.72"></a> |
| <span class="sourceLineNo">073</span> *<a name="line.73"></a> |
| <span class="sourceLineNo">074</span> * @param snapshotCleanupEnabled true if the snapshot auto cleanup should be on,<a name="line.74"></a> |
| <span class="sourceLineNo">075</span> * false otherwise<a name="line.75"></a> |
| <span class="sourceLineNo">076</span> * @throws KeeperException if ZooKeeper operation fails<a name="line.76"></a> |
| <span class="sourceLineNo">077</span> */<a name="line.77"></a> |
| <span class="sourceLineNo">078</span> public void setSnapshotCleanupEnabled(final boolean snapshotCleanupEnabled)<a name="line.78"></a> |
| <span class="sourceLineNo">079</span> throws KeeperException {<a name="line.79"></a> |
| <span class="sourceLineNo">080</span> byte [] snapshotCleanupZNodeData = toByteArray(snapshotCleanupEnabled);<a name="line.80"></a> |
| <span class="sourceLineNo">081</span> try {<a name="line.81"></a> |
| <span class="sourceLineNo">082</span> ZKUtil.setData(watcher, watcher.getZNodePaths().snapshotCleanupZNode,<a name="line.82"></a> |
| <span class="sourceLineNo">083</span> snapshotCleanupZNodeData);<a name="line.83"></a> |
| <span class="sourceLineNo">084</span> } catch(KeeperException.NoNodeException nne) {<a name="line.84"></a> |
| <span class="sourceLineNo">085</span> ZKUtil.createAndWatch(watcher, watcher.getZNodePaths().snapshotCleanupZNode,<a name="line.85"></a> |
| <span class="sourceLineNo">086</span> snapshotCleanupZNodeData);<a name="line.86"></a> |
| <span class="sourceLineNo">087</span> }<a name="line.87"></a> |
| <span class="sourceLineNo">088</span> super.nodeDataChanged(watcher.getZNodePaths().snapshotCleanupZNode);<a name="line.88"></a> |
| <span class="sourceLineNo">089</span> }<a name="line.89"></a> |
| <span class="sourceLineNo">090</span><a name="line.90"></a> |
| <span class="sourceLineNo">091</span> private byte[] toByteArray(final boolean isSnapshotCleanupEnabled) {<a name="line.91"></a> |
| <span class="sourceLineNo">092</span> SnapshotCleanupProtos.SnapshotCleanupState.Builder builder =<a name="line.92"></a> |
| <span class="sourceLineNo">093</span> SnapshotCleanupProtos.SnapshotCleanupState.newBuilder();<a name="line.93"></a> |
| <span class="sourceLineNo">094</span> builder.setSnapshotCleanupEnabled(isSnapshotCleanupEnabled);<a name="line.94"></a> |
| <span class="sourceLineNo">095</span> return ProtobufUtil.prependPBMagic(builder.build().toByteArray());<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> private SnapshotCleanupProtos.SnapshotCleanupState parseFrom(final byte[] pbBytes)<a name="line.98"></a> |
| <span class="sourceLineNo">099</span> throws DeserializationException {<a name="line.99"></a> |
| <span class="sourceLineNo">100</span> ProtobufUtil.expectPBMagicPrefix(pbBytes);<a name="line.100"></a> |
| <span class="sourceLineNo">101</span> SnapshotCleanupProtos.SnapshotCleanupState.Builder builder =<a name="line.101"></a> |
| <span class="sourceLineNo">102</span> SnapshotCleanupProtos.SnapshotCleanupState.newBuilder();<a name="line.102"></a> |
| <span class="sourceLineNo">103</span> try {<a name="line.103"></a> |
| <span class="sourceLineNo">104</span> int magicLen = ProtobufUtil.lengthOfPBMagic();<a name="line.104"></a> |
| <span class="sourceLineNo">105</span> ProtobufUtil.mergeFrom(builder, pbBytes, magicLen, pbBytes.length - magicLen);<a name="line.105"></a> |
| <span class="sourceLineNo">106</span> } catch (IOException e) {<a name="line.106"></a> |
| <span class="sourceLineNo">107</span> throw new DeserializationException(e);<a name="line.107"></a> |
| <span class="sourceLineNo">108</span> }<a name="line.108"></a> |
| <span class="sourceLineNo">109</span> return builder.build();<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>}<a name="line.112"></a> |
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| </pre> |
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