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<FONT color="green">001</FONT>    /**<a name="line.1"></a>
<FONT color="green">002</FONT>     * Licensed to the Apache Software Foundation (ASF) under one<a name="line.2"></a>
<FONT color="green">003</FONT>     * or more contributor license agreements.  See the NOTICE file<a name="line.3"></a>
<FONT color="green">004</FONT>     * distributed with this work for additional information<a name="line.4"></a>
<FONT color="green">005</FONT>     * regarding copyright ownership.  The ASF licenses this file<a name="line.5"></a>
<FONT color="green">006</FONT>     * to you under the Apache License, Version 2.0 (the<a name="line.6"></a>
<FONT color="green">007</FONT>     * "License"); you may not use this file except in compliance<a name="line.7"></a>
<FONT color="green">008</FONT>     * with the License.  You may obtain a copy of the License at<a name="line.8"></a>
<FONT color="green">009</FONT>     *<a name="line.9"></a>
<FONT color="green">010</FONT>     *     http://www.apache.org/licenses/LICENSE-2.0<a name="line.10"></a>
<FONT color="green">011</FONT>     *<a name="line.11"></a>
<FONT color="green">012</FONT>     * Unless required by applicable law or agreed to in writing, software<a name="line.12"></a>
<FONT color="green">013</FONT>     * distributed under the License is distributed on an "AS IS" BASIS,<a name="line.13"></a>
<FONT color="green">014</FONT>     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.<a name="line.14"></a>
<FONT color="green">015</FONT>     * See the License for the specific language governing permissions and<a name="line.15"></a>
<FONT color="green">016</FONT>     * limitations under the License.<a name="line.16"></a>
<FONT color="green">017</FONT>     */<a name="line.17"></a>
<FONT color="green">018</FONT>    <a name="line.18"></a>
<FONT color="green">019</FONT>    package org.apache.hadoop.mapreduce.lib.jobcontrol;<a name="line.19"></a>
<FONT color="green">020</FONT>    <a name="line.20"></a>
<FONT color="green">021</FONT>    <a name="line.21"></a>
<FONT color="green">022</FONT>    import java.io.IOException;<a name="line.22"></a>
<FONT color="green">023</FONT>    import java.util.ArrayList;<a name="line.23"></a>
<FONT color="green">024</FONT>    import java.util.List;<a name="line.24"></a>
<FONT color="green">025</FONT>    <a name="line.25"></a>
<FONT color="green">026</FONT>    import org.apache.commons.logging.Log;<a name="line.26"></a>
<FONT color="green">027</FONT>    import org.apache.commons.logging.LogFactory;<a name="line.27"></a>
<FONT color="green">028</FONT>    import org.apache.hadoop.classification.InterfaceAudience;<a name="line.28"></a>
<FONT color="green">029</FONT>    import org.apache.hadoop.classification.InterfaceStability;<a name="line.29"></a>
<FONT color="green">030</FONT>    import org.apache.hadoop.conf.Configuration;<a name="line.30"></a>
<FONT color="green">031</FONT>    import org.apache.hadoop.fs.FileSystem;<a name="line.31"></a>
<FONT color="green">032</FONT>    import org.apache.hadoop.fs.Path;<a name="line.32"></a>
<FONT color="green">033</FONT>    import org.apache.hadoop.mapreduce.Job;<a name="line.33"></a>
<FONT color="green">034</FONT>    import org.apache.hadoop.mapreduce.JobID;<a name="line.34"></a>
<FONT color="green">035</FONT>    import org.apache.hadoop.mapreduce.lib.input.FileInputFormat;<a name="line.35"></a>
<FONT color="green">036</FONT>    import org.apache.hadoop.util.StringUtils;<a name="line.36"></a>
<FONT color="green">037</FONT>    <a name="line.37"></a>
<FONT color="green">038</FONT>    /** <a name="line.38"></a>
<FONT color="green">039</FONT>     *  This class encapsulates a MapReduce job and its dependency. It monitors <a name="line.39"></a>
<FONT color="green">040</FONT>     *  the states of the depending jobs and updates the state of this job.<a name="line.40"></a>
<FONT color="green">041</FONT>     *  A job starts in the WAITING state. If it does not have any depending jobs,<a name="line.41"></a>
<FONT color="green">042</FONT>     *  or all of the depending jobs are in SUCCESS state, then the job state <a name="line.42"></a>
<FONT color="green">043</FONT>     *  will become READY. If any depending jobs fail, the job will fail too. <a name="line.43"></a>
<FONT color="green">044</FONT>     *  When in READY state, the job can be submitted to Hadoop for execution, with<a name="line.44"></a>
<FONT color="green">045</FONT>     *  the state changing into RUNNING state. From RUNNING state, the job <a name="line.45"></a>
<FONT color="green">046</FONT>     *  can get into SUCCESS or FAILED state, depending <a name="line.46"></a>
<FONT color="green">047</FONT>     *  the status of the job execution.<a name="line.47"></a>
<FONT color="green">048</FONT>     */<a name="line.48"></a>
<FONT color="green">049</FONT>    @InterfaceAudience.Public<a name="line.49"></a>
<FONT color="green">050</FONT>    @InterfaceStability.Evolving<a name="line.50"></a>
<FONT color="green">051</FONT>    public class ControlledJob {<a name="line.51"></a>
<FONT color="green">052</FONT>      private static final Log LOG = LogFactory.getLog(ControlledJob.class);<a name="line.52"></a>
<FONT color="green">053</FONT>    <a name="line.53"></a>
<FONT color="green">054</FONT>      // A job will be in one of the following states<a name="line.54"></a>
<FONT color="green">055</FONT>      public static enum State {SUCCESS, WAITING, RUNNING, READY, FAILED,<a name="line.55"></a>
<FONT color="green">056</FONT>                                DEPENDENT_FAILED}; <a name="line.56"></a>
<FONT color="green">057</FONT>      public static final String CREATE_DIR = "mapreduce.jobcontrol.createdir.ifnotexist";<a name="line.57"></a>
<FONT color="green">058</FONT>      private State state;<a name="line.58"></a>
<FONT color="green">059</FONT>      private String controlID;     // assigned and used by JobControl class<a name="line.59"></a>
<FONT color="green">060</FONT>      private Job job;               // mapreduce job to be executed.<a name="line.60"></a>
<FONT color="green">061</FONT>      // some info for human consumption, e.g. the reason why the job failed<a name="line.61"></a>
<FONT color="green">062</FONT>      private String message;<a name="line.62"></a>
<FONT color="green">063</FONT>      // the jobs the current job depends on<a name="line.63"></a>
<FONT color="green">064</FONT>      private List&lt;ControlledJob&gt; dependingJobs;<a name="line.64"></a>
<FONT color="green">065</FONT>            <a name="line.65"></a>
<FONT color="green">066</FONT>      /** <a name="line.66"></a>
<FONT color="green">067</FONT>       * Construct a job.<a name="line.67"></a>
<FONT color="green">068</FONT>       * @param job a mapreduce job to be executed.<a name="line.68"></a>
<FONT color="green">069</FONT>       * @param dependingJobs an array of jobs the current job depends on<a name="line.69"></a>
<FONT color="green">070</FONT>       */<a name="line.70"></a>
<FONT color="green">071</FONT>      public ControlledJob(Job job, List&lt;ControlledJob&gt; dependingJobs) <a name="line.71"></a>
<FONT color="green">072</FONT>          throws IOException {<a name="line.72"></a>
<FONT color="green">073</FONT>        this.job = job;<a name="line.73"></a>
<FONT color="green">074</FONT>        this.dependingJobs = dependingJobs;<a name="line.74"></a>
<FONT color="green">075</FONT>        this.state = State.WAITING;<a name="line.75"></a>
<FONT color="green">076</FONT>        this.controlID = "unassigned";<a name="line.76"></a>
<FONT color="green">077</FONT>        this.message = "just initialized";<a name="line.77"></a>
<FONT color="green">078</FONT>      }<a name="line.78"></a>
<FONT color="green">079</FONT>      <a name="line.79"></a>
<FONT color="green">080</FONT>      /**<a name="line.80"></a>
<FONT color="green">081</FONT>       * Construct a job.<a name="line.81"></a>
<FONT color="green">082</FONT>       * <a name="line.82"></a>
<FONT color="green">083</FONT>       * @param conf mapred job configuration representing a job to be executed.<a name="line.83"></a>
<FONT color="green">084</FONT>       * @throws IOException<a name="line.84"></a>
<FONT color="green">085</FONT>       */<a name="line.85"></a>
<FONT color="green">086</FONT>      public ControlledJob(Configuration conf) throws IOException {<a name="line.86"></a>
<FONT color="green">087</FONT>        this(new Job(conf), null);<a name="line.87"></a>
<FONT color="green">088</FONT>      }<a name="line.88"></a>
<FONT color="green">089</FONT>            <a name="line.89"></a>
<FONT color="green">090</FONT>      @Override<a name="line.90"></a>
<FONT color="green">091</FONT>      public String toString() {<a name="line.91"></a>
<FONT color="green">092</FONT>        StringBuffer sb = new StringBuffer();<a name="line.92"></a>
<FONT color="green">093</FONT>        sb.append("job name:\t").append(this.job.getJobName()).append("\n");<a name="line.93"></a>
<FONT color="green">094</FONT>        sb.append("job id:\t").append(this.controlID).append("\n");<a name="line.94"></a>
<FONT color="green">095</FONT>        sb.append("job state:\t").append(this.state).append("\n");<a name="line.95"></a>
<FONT color="green">096</FONT>        sb.append("job mapred id:\t").append(this.job.getJobID()).append("\n");<a name="line.96"></a>
<FONT color="green">097</FONT>        sb.append("job message:\t").append(this.message).append("\n");<a name="line.97"></a>
<FONT color="green">098</FONT>                    <a name="line.98"></a>
<FONT color="green">099</FONT>        if (this.dependingJobs == null || this.dependingJobs.size() == 0) {<a name="line.99"></a>
<FONT color="green">100</FONT>          sb.append("job has no depending job:\t").append("\n");<a name="line.100"></a>
<FONT color="green">101</FONT>        } else {<a name="line.101"></a>
<FONT color="green">102</FONT>          sb.append("job has ").append(this.dependingJobs.size()).<a name="line.102"></a>
<FONT color="green">103</FONT>             append(" dependeng jobs:\n");<a name="line.103"></a>
<FONT color="green">104</FONT>          for (int i = 0; i &lt; this.dependingJobs.size(); i++) {<a name="line.104"></a>
<FONT color="green">105</FONT>            sb.append("\t depending job ").append(i).append(":\t");<a name="line.105"></a>
<FONT color="green">106</FONT>            sb.append((this.dependingJobs.get(i)).getJobName()).append("\n");<a name="line.106"></a>
<FONT color="green">107</FONT>          }<a name="line.107"></a>
<FONT color="green">108</FONT>        }<a name="line.108"></a>
<FONT color="green">109</FONT>        return sb.toString();<a name="line.109"></a>
<FONT color="green">110</FONT>      }<a name="line.110"></a>
<FONT color="green">111</FONT>            <a name="line.111"></a>
<FONT color="green">112</FONT>      /**<a name="line.112"></a>
<FONT color="green">113</FONT>       * @return the job name of this job<a name="line.113"></a>
<FONT color="green">114</FONT>       */<a name="line.114"></a>
<FONT color="green">115</FONT>      public String getJobName() {<a name="line.115"></a>
<FONT color="green">116</FONT>        return job.getJobName();<a name="line.116"></a>
<FONT color="green">117</FONT>      }<a name="line.117"></a>
<FONT color="green">118</FONT>            <a name="line.118"></a>
<FONT color="green">119</FONT>      /**<a name="line.119"></a>
<FONT color="green">120</FONT>       * Set the job name for  this job.<a name="line.120"></a>
<FONT color="green">121</FONT>       * @param jobName the job name<a name="line.121"></a>
<FONT color="green">122</FONT>       */<a name="line.122"></a>
<FONT color="green">123</FONT>      public void setJobName(String jobName) {<a name="line.123"></a>
<FONT color="green">124</FONT>        job.setJobName(jobName);<a name="line.124"></a>
<FONT color="green">125</FONT>      }<a name="line.125"></a>
<FONT color="green">126</FONT>            <a name="line.126"></a>
<FONT color="green">127</FONT>      /**<a name="line.127"></a>
<FONT color="green">128</FONT>       * @return the job ID of this job assigned by JobControl<a name="line.128"></a>
<FONT color="green">129</FONT>       */<a name="line.129"></a>
<FONT color="green">130</FONT>      public String getJobID() {<a name="line.130"></a>
<FONT color="green">131</FONT>        return this.controlID;<a name="line.131"></a>
<FONT color="green">132</FONT>      }<a name="line.132"></a>
<FONT color="green">133</FONT>            <a name="line.133"></a>
<FONT color="green">134</FONT>      /**<a name="line.134"></a>
<FONT color="green">135</FONT>       * Set the job ID for  this job.<a name="line.135"></a>
<FONT color="green">136</FONT>       * @param id the job ID<a name="line.136"></a>
<FONT color="green">137</FONT>       */<a name="line.137"></a>
<FONT color="green">138</FONT>      public void setJobID(String id) {<a name="line.138"></a>
<FONT color="green">139</FONT>        this.controlID = id;<a name="line.139"></a>
<FONT color="green">140</FONT>      }<a name="line.140"></a>
<FONT color="green">141</FONT>            <a name="line.141"></a>
<FONT color="green">142</FONT>      /**<a name="line.142"></a>
<FONT color="green">143</FONT>       * @return the mapred ID of this job as assigned by the <a name="line.143"></a>
<FONT color="green">144</FONT>       * mapred framework.<a name="line.144"></a>
<FONT color="green">145</FONT>       */<a name="line.145"></a>
<FONT color="green">146</FONT>      public JobID getMapredJobID() {<a name="line.146"></a>
<FONT color="green">147</FONT>        return this.job.getJobID();<a name="line.147"></a>
<FONT color="green">148</FONT>      }<a name="line.148"></a>
<FONT color="green">149</FONT>      <a name="line.149"></a>
<FONT color="green">150</FONT>      /**<a name="line.150"></a>
<FONT color="green">151</FONT>       * @return the mapreduce job <a name="line.151"></a>
<FONT color="green">152</FONT>       */<a name="line.152"></a>
<FONT color="green">153</FONT>      public synchronized Job getJob() {<a name="line.153"></a>
<FONT color="green">154</FONT>        return this.job;<a name="line.154"></a>
<FONT color="green">155</FONT>      }<a name="line.155"></a>
<FONT color="green">156</FONT>    <a name="line.156"></a>
<FONT color="green">157</FONT>      /**<a name="line.157"></a>
<FONT color="green">158</FONT>       * Set the mapreduce job<a name="line.158"></a>
<FONT color="green">159</FONT>       * @param job the mapreduce job for this job.<a name="line.159"></a>
<FONT color="green">160</FONT>       */<a name="line.160"></a>
<FONT color="green">161</FONT>      public synchronized void setJob(Job job) {<a name="line.161"></a>
<FONT color="green">162</FONT>        this.job = job;<a name="line.162"></a>
<FONT color="green">163</FONT>      }<a name="line.163"></a>
<FONT color="green">164</FONT>    <a name="line.164"></a>
<FONT color="green">165</FONT>      /**<a name="line.165"></a>
<FONT color="green">166</FONT>       * @return the state of this job<a name="line.166"></a>
<FONT color="green">167</FONT>       */<a name="line.167"></a>
<FONT color="green">168</FONT>      public synchronized State getJobState() {<a name="line.168"></a>
<FONT color="green">169</FONT>        return this.state;<a name="line.169"></a>
<FONT color="green">170</FONT>      }<a name="line.170"></a>
<FONT color="green">171</FONT>            <a name="line.171"></a>
<FONT color="green">172</FONT>      /**<a name="line.172"></a>
<FONT color="green">173</FONT>       * Set the state for this job.<a name="line.173"></a>
<FONT color="green">174</FONT>       * @param state the new state for this job.<a name="line.174"></a>
<FONT color="green">175</FONT>       */<a name="line.175"></a>
<FONT color="green">176</FONT>      protected synchronized void setJobState(State state) {<a name="line.176"></a>
<FONT color="green">177</FONT>        this.state = state;<a name="line.177"></a>
<FONT color="green">178</FONT>      }<a name="line.178"></a>
<FONT color="green">179</FONT>            <a name="line.179"></a>
<FONT color="green">180</FONT>      /**<a name="line.180"></a>
<FONT color="green">181</FONT>       * @return the message of this job<a name="line.181"></a>
<FONT color="green">182</FONT>       */<a name="line.182"></a>
<FONT color="green">183</FONT>      public synchronized String getMessage() {<a name="line.183"></a>
<FONT color="green">184</FONT>        return this.message;<a name="line.184"></a>
<FONT color="green">185</FONT>      }<a name="line.185"></a>
<FONT color="green">186</FONT>    <a name="line.186"></a>
<FONT color="green">187</FONT>      /**<a name="line.187"></a>
<FONT color="green">188</FONT>       * Set the message for this job.<a name="line.188"></a>
<FONT color="green">189</FONT>       * @param message the message for this job.<a name="line.189"></a>
<FONT color="green">190</FONT>       */<a name="line.190"></a>
<FONT color="green">191</FONT>      public synchronized void setMessage(String message) {<a name="line.191"></a>
<FONT color="green">192</FONT>        this.message = message;<a name="line.192"></a>
<FONT color="green">193</FONT>      }<a name="line.193"></a>
<FONT color="green">194</FONT>    <a name="line.194"></a>
<FONT color="green">195</FONT>      /**<a name="line.195"></a>
<FONT color="green">196</FONT>       * @return the depending jobs of this job<a name="line.196"></a>
<FONT color="green">197</FONT>       */<a name="line.197"></a>
<FONT color="green">198</FONT>      public List&lt;ControlledJob&gt; getDependentJobs() {<a name="line.198"></a>
<FONT color="green">199</FONT>        return this.dependingJobs;<a name="line.199"></a>
<FONT color="green">200</FONT>      }<a name="line.200"></a>
<FONT color="green">201</FONT>      <a name="line.201"></a>
<FONT color="green">202</FONT>      /**<a name="line.202"></a>
<FONT color="green">203</FONT>       * Add a job to this jobs' dependency list. <a name="line.203"></a>
<FONT color="green">204</FONT>       * Dependent jobs can only be added while a Job <a name="line.204"></a>
<FONT color="green">205</FONT>       * is waiting to run, not during or afterwards.<a name="line.205"></a>
<FONT color="green">206</FONT>       * <a name="line.206"></a>
<FONT color="green">207</FONT>       * @param dependingJob Job that this Job depends on.<a name="line.207"></a>
<FONT color="green">208</FONT>       * @return &lt;tt&gt;true&lt;/tt&gt; if the Job was added.<a name="line.208"></a>
<FONT color="green">209</FONT>       */<a name="line.209"></a>
<FONT color="green">210</FONT>      public synchronized boolean addDependingJob(ControlledJob dependingJob) {<a name="line.210"></a>
<FONT color="green">211</FONT>        if (this.state == State.WAITING) { //only allowed to add jobs when waiting<a name="line.211"></a>
<FONT color="green">212</FONT>          if (this.dependingJobs == null) {<a name="line.212"></a>
<FONT color="green">213</FONT>            this.dependingJobs = new ArrayList&lt;ControlledJob&gt;();<a name="line.213"></a>
<FONT color="green">214</FONT>          }<a name="line.214"></a>
<FONT color="green">215</FONT>          return this.dependingJobs.add(dependingJob);<a name="line.215"></a>
<FONT color="green">216</FONT>        } else {<a name="line.216"></a>
<FONT color="green">217</FONT>          return false;<a name="line.217"></a>
<FONT color="green">218</FONT>        }<a name="line.218"></a>
<FONT color="green">219</FONT>      }<a name="line.219"></a>
<FONT color="green">220</FONT>            <a name="line.220"></a>
<FONT color="green">221</FONT>      /**<a name="line.221"></a>
<FONT color="green">222</FONT>       * @return true if this job is in a complete state<a name="line.222"></a>
<FONT color="green">223</FONT>       */<a name="line.223"></a>
<FONT color="green">224</FONT>      public synchronized boolean isCompleted() {<a name="line.224"></a>
<FONT color="green">225</FONT>        return this.state == State.FAILED || <a name="line.225"></a>
<FONT color="green">226</FONT>          this.state == State.DEPENDENT_FAILED ||<a name="line.226"></a>
<FONT color="green">227</FONT>          this.state == State.SUCCESS;<a name="line.227"></a>
<FONT color="green">228</FONT>      }<a name="line.228"></a>
<FONT color="green">229</FONT>            <a name="line.229"></a>
<FONT color="green">230</FONT>      /**<a name="line.230"></a>
<FONT color="green">231</FONT>       * @return true if this job is in READY state<a name="line.231"></a>
<FONT color="green">232</FONT>       */<a name="line.232"></a>
<FONT color="green">233</FONT>      public synchronized boolean isReady() {<a name="line.233"></a>
<FONT color="green">234</FONT>        return this.state == State.READY;<a name="line.234"></a>
<FONT color="green">235</FONT>      }<a name="line.235"></a>
<FONT color="green">236</FONT>    <a name="line.236"></a>
<FONT color="green">237</FONT>      public void killJob() throws IOException, InterruptedException {<a name="line.237"></a>
<FONT color="green">238</FONT>        job.killJob();<a name="line.238"></a>
<FONT color="green">239</FONT>      }<a name="line.239"></a>
<FONT color="green">240</FONT>      <a name="line.240"></a>
<FONT color="green">241</FONT>      public synchronized void failJob(String message) throws IOException, InterruptedException {<a name="line.241"></a>
<FONT color="green">242</FONT>        try {<a name="line.242"></a>
<FONT color="green">243</FONT>          if(job != null &amp;&amp; this.state == State.RUNNING) {<a name="line.243"></a>
<FONT color="green">244</FONT>            job.killJob();<a name="line.244"></a>
<FONT color="green">245</FONT>          }<a name="line.245"></a>
<FONT color="green">246</FONT>        } finally {<a name="line.246"></a>
<FONT color="green">247</FONT>          this.state = State.FAILED;<a name="line.247"></a>
<FONT color="green">248</FONT>          this.message = message;<a name="line.248"></a>
<FONT color="green">249</FONT>        }<a name="line.249"></a>
<FONT color="green">250</FONT>      }<a name="line.250"></a>
<FONT color="green">251</FONT>      <a name="line.251"></a>
<FONT color="green">252</FONT>      /**<a name="line.252"></a>
<FONT color="green">253</FONT>       * Check the state of this running job. The state may <a name="line.253"></a>
<FONT color="green">254</FONT>       * remain the same, become SUCCESS or FAILED.<a name="line.254"></a>
<FONT color="green">255</FONT>       */<a name="line.255"></a>
<FONT color="green">256</FONT>      private void checkRunningState() throws IOException, InterruptedException {<a name="line.256"></a>
<FONT color="green">257</FONT>        try {<a name="line.257"></a>
<FONT color="green">258</FONT>          if (job.isComplete()) {<a name="line.258"></a>
<FONT color="green">259</FONT>            if (job.isSuccessful()) {<a name="line.259"></a>
<FONT color="green">260</FONT>              this.state = State.SUCCESS;<a name="line.260"></a>
<FONT color="green">261</FONT>            } else {<a name="line.261"></a>
<FONT color="green">262</FONT>              this.state = State.FAILED;<a name="line.262"></a>
<FONT color="green">263</FONT>              this.message = "Job failed!";<a name="line.263"></a>
<FONT color="green">264</FONT>            }<a name="line.264"></a>
<FONT color="green">265</FONT>          }<a name="line.265"></a>
<FONT color="green">266</FONT>        } catch (IOException ioe) {<a name="line.266"></a>
<FONT color="green">267</FONT>          this.state = State.FAILED;<a name="line.267"></a>
<FONT color="green">268</FONT>          this.message = StringUtils.stringifyException(ioe);<a name="line.268"></a>
<FONT color="green">269</FONT>          try {<a name="line.269"></a>
<FONT color="green">270</FONT>            if (job != null) {<a name="line.270"></a>
<FONT color="green">271</FONT>              job.killJob();<a name="line.271"></a>
<FONT color="green">272</FONT>            }<a name="line.272"></a>
<FONT color="green">273</FONT>          } catch (IOException e) {}<a name="line.273"></a>
<FONT color="green">274</FONT>        }<a name="line.274"></a>
<FONT color="green">275</FONT>      }<a name="line.275"></a>
<FONT color="green">276</FONT>            <a name="line.276"></a>
<FONT color="green">277</FONT>      /**<a name="line.277"></a>
<FONT color="green">278</FONT>       * Check and update the state of this job. The state changes  <a name="line.278"></a>
<FONT color="green">279</FONT>       * depending on its current state and the states of the depending jobs.<a name="line.279"></a>
<FONT color="green">280</FONT>       */<a name="line.280"></a>
<FONT color="green">281</FONT>       synchronized State checkState() throws IOException, InterruptedException {<a name="line.281"></a>
<FONT color="green">282</FONT>        if (this.state == State.RUNNING) {<a name="line.282"></a>
<FONT color="green">283</FONT>          checkRunningState();<a name="line.283"></a>
<FONT color="green">284</FONT>        }<a name="line.284"></a>
<FONT color="green">285</FONT>        if (this.state != State.WAITING) {<a name="line.285"></a>
<FONT color="green">286</FONT>          return this.state;<a name="line.286"></a>
<FONT color="green">287</FONT>        }<a name="line.287"></a>
<FONT color="green">288</FONT>        if (this.dependingJobs == null || this.dependingJobs.size() == 0) {<a name="line.288"></a>
<FONT color="green">289</FONT>          this.state = State.READY;<a name="line.289"></a>
<FONT color="green">290</FONT>          return this.state;<a name="line.290"></a>
<FONT color="green">291</FONT>        }<a name="line.291"></a>
<FONT color="green">292</FONT>        ControlledJob pred = null;<a name="line.292"></a>
<FONT color="green">293</FONT>        int n = this.dependingJobs.size();<a name="line.293"></a>
<FONT color="green">294</FONT>        for (int i = 0; i &lt; n; i++) {<a name="line.294"></a>
<FONT color="green">295</FONT>          pred = this.dependingJobs.get(i);<a name="line.295"></a>
<FONT color="green">296</FONT>          State s = pred.checkState();<a name="line.296"></a>
<FONT color="green">297</FONT>          if (s == State.WAITING || s == State.READY || s == State.RUNNING) {<a name="line.297"></a>
<FONT color="green">298</FONT>            break; // a pred is still not completed, continue in WAITING<a name="line.298"></a>
<FONT color="green">299</FONT>            // state<a name="line.299"></a>
<FONT color="green">300</FONT>          }<a name="line.300"></a>
<FONT color="green">301</FONT>          if (s == State.FAILED || s == State.DEPENDENT_FAILED) {<a name="line.301"></a>
<FONT color="green">302</FONT>            this.state = State.DEPENDENT_FAILED;<a name="line.302"></a>
<FONT color="green">303</FONT>            this.message = "depending job " + i + " with jobID "<a name="line.303"></a>
<FONT color="green">304</FONT>              + pred.getJobID() + " failed. " + pred.getMessage();<a name="line.304"></a>
<FONT color="green">305</FONT>            break;<a name="line.305"></a>
<FONT color="green">306</FONT>          }<a name="line.306"></a>
<FONT color="green">307</FONT>          // pred must be in success state<a name="line.307"></a>
<FONT color="green">308</FONT>          if (i == n - 1) {<a name="line.308"></a>
<FONT color="green">309</FONT>            this.state = State.READY;<a name="line.309"></a>
<FONT color="green">310</FONT>          }<a name="line.310"></a>
<FONT color="green">311</FONT>        }<a name="line.311"></a>
<FONT color="green">312</FONT>    <a name="line.312"></a>
<FONT color="green">313</FONT>        return this.state;<a name="line.313"></a>
<FONT color="green">314</FONT>      }<a name="line.314"></a>
<FONT color="green">315</FONT>            <a name="line.315"></a>
<FONT color="green">316</FONT>      /**<a name="line.316"></a>
<FONT color="green">317</FONT>       * Submit this job to mapred. The state becomes RUNNING if submission <a name="line.317"></a>
<FONT color="green">318</FONT>       * is successful, FAILED otherwise.  <a name="line.318"></a>
<FONT color="green">319</FONT>       */<a name="line.319"></a>
<FONT color="green">320</FONT>      protected synchronized void submit() {<a name="line.320"></a>
<FONT color="green">321</FONT>        try {<a name="line.321"></a>
<FONT color="green">322</FONT>          Configuration conf = job.getConfiguration();<a name="line.322"></a>
<FONT color="green">323</FONT>          if (conf.getBoolean(CREATE_DIR, false)) {<a name="line.323"></a>
<FONT color="green">324</FONT>            FileSystem fs = FileSystem.get(conf);<a name="line.324"></a>
<FONT color="green">325</FONT>            Path inputPaths[] = FileInputFormat.getInputPaths(job);<a name="line.325"></a>
<FONT color="green">326</FONT>            for (int i = 0; i &lt; inputPaths.length; i++) {<a name="line.326"></a>
<FONT color="green">327</FONT>              if (!fs.exists(inputPaths[i])) {<a name="line.327"></a>
<FONT color="green">328</FONT>                try {<a name="line.328"></a>
<FONT color="green">329</FONT>                  fs.mkdirs(inputPaths[i]);<a name="line.329"></a>
<FONT color="green">330</FONT>                } catch (IOException e) {<a name="line.330"></a>
<FONT color="green">331</FONT>    <a name="line.331"></a>
<FONT color="green">332</FONT>                }<a name="line.332"></a>
<FONT color="green">333</FONT>              }<a name="line.333"></a>
<FONT color="green">334</FONT>            }<a name="line.334"></a>
<FONT color="green">335</FONT>          }<a name="line.335"></a>
<FONT color="green">336</FONT>          job.submit();<a name="line.336"></a>
<FONT color="green">337</FONT>          this.state = State.RUNNING;<a name="line.337"></a>
<FONT color="green">338</FONT>        } catch (Exception ioe) {<a name="line.338"></a>
<FONT color="green">339</FONT>          LOG.info(getJobName()+" got an error while submitting ",ioe);<a name="line.339"></a>
<FONT color="green">340</FONT>          this.state = State.FAILED;<a name="line.340"></a>
<FONT color="green">341</FONT>          this.message = StringUtils.stringifyException(ioe);<a name="line.341"></a>
<FONT color="green">342</FONT>        }<a name="line.342"></a>
<FONT color="green">343</FONT>      }<a name="line.343"></a>
<FONT color="green">344</FONT>            <a name="line.344"></a>
<FONT color="green">345</FONT>    }<a name="line.345"></a>




























































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