http://git-wip-us.apache.org/repos/asf/hbase-site/blob/40477ee9/devapidocs/src-html/org/apache/hadoop/hbase/procedure2/Procedure.html ---------------------------------------------------------------------- diff --git a/devapidocs/src-html/org/apache/hadoop/hbase/procedure2/Procedure.html b/devapidocs/src-html/org/apache/hadoop/hbase/procedure2/Procedure.html index c8a3f1e..ed25b40 100644 --- a/devapidocs/src-html/org/apache/hadoop/hbase/procedure2/Procedure.html +++ b/devapidocs/src-html/org/apache/hadoop/hbase/procedure2/Procedure.html @@ -83,854 +83,859 @@ <span class="sourceLineNo">075</span> * during the execute() step. In case of failure and restart, rollback() may be<a name="line.75"></a> <span class="sourceLineNo">076</span> * called multiple times, so again the code must be idempotent.<a name="line.76"></a> <span class="sourceLineNo">077</span> *<a name="line.77"></a> -<span class="sourceLineNo">078</span> * <p>Procedure can be made respect a locking regime. It has acqure/release methods as<a name="line.78"></a> +<span class="sourceLineNo">078</span> * <p>Procedure can be made respect a locking regime. It has acquire/release methods as<a name="line.78"></a> <span class="sourceLineNo">079</span> * well as an {@link #hasLock(Object)}. The lock implementation is up to the implementor.<a name="line.79"></a> <span class="sourceLineNo">080</span> * If an entity needs to be locked for the life of a procedure -- not just the calls to<a name="line.80"></a> <span class="sourceLineNo">081</span> * execute -- then implementations should say so with the {@link #holdLock(Object)}<a name="line.81"></a> <span class="sourceLineNo">082</span> * method.<a name="line.82"></a> <span class="sourceLineNo">083</span> *<a name="line.83"></a> -<span class="sourceLineNo">084</span> * <p>There are hooks for collecting metrics on submit of the procedure and on finish.<a name="line.84"></a> -<span class="sourceLineNo">085</span> * See {@link #updateMetricsOnSubmit(Object)} and<a name="line.85"></a> -<span class="sourceLineNo">086</span> * {@link #updateMetricsOnFinish(Object, long, boolean)}.<a name="line.86"></a> -<span class="sourceLineNo">087</span> */<a name="line.87"></a> -<span class="sourceLineNo">088</span>@InterfaceAudience.Private<a name="line.88"></a> -<span class="sourceLineNo">089</span>@InterfaceStability.Evolving<a name="line.89"></a> -<span class="sourceLineNo">090</span>public abstract class Procedure<TEnvironment> implements Comparable<Procedure<TEnvironment>> {<a name="line.90"></a> -<span class="sourceLineNo">091</span> private static final Logger LOG = LoggerFactory.getLogger(Procedure.class);<a name="line.91"></a> -<span class="sourceLineNo">092</span> public static final long NO_PROC_ID = -1;<a name="line.92"></a> -<span class="sourceLineNo">093</span> protected static final int NO_TIMEOUT = -1;<a name="line.93"></a> -<span class="sourceLineNo">094</span><a name="line.94"></a> -<span class="sourceLineNo">095</span> public enum LockState {<a name="line.95"></a> -<span class="sourceLineNo">096</span> LOCK_ACQUIRED, // Lock acquired and ready to execute<a name="line.96"></a> -<span class="sourceLineNo">097</span> LOCK_YIELD_WAIT, // Lock not acquired, framework needs to yield<a name="line.97"></a> -<span class="sourceLineNo">098</span> LOCK_EVENT_WAIT, // Lock not acquired, an event will yield the procedure<a name="line.98"></a> -<span class="sourceLineNo">099</span> }<a name="line.99"></a> -<span class="sourceLineNo">100</span><a name="line.100"></a> -<span class="sourceLineNo">101</span> // Unchanged after initialization<a name="line.101"></a> -<span class="sourceLineNo">102</span> private NonceKey nonceKey = null;<a name="line.102"></a> -<span class="sourceLineNo">103</span> private String owner = null;<a name="line.103"></a> -<span class="sourceLineNo">104</span> private long parentProcId = NO_PROC_ID;<a name="line.104"></a> -<span class="sourceLineNo">105</span> private long rootProcId = NO_PROC_ID;<a name="line.105"></a> -<span class="sourceLineNo">106</span> private long procId = NO_PROC_ID;<a name="line.106"></a> -<span class="sourceLineNo">107</span> private long submittedTime;<a name="line.107"></a> -<span class="sourceLineNo">108</span><a name="line.108"></a> -<span class="sourceLineNo">109</span> // Runtime state, updated every operation<a name="line.109"></a> -<span class="sourceLineNo">110</span> private ProcedureState state = ProcedureState.INITIALIZING;<a name="line.110"></a> -<span class="sourceLineNo">111</span> private RemoteProcedureException exception = null;<a name="line.111"></a> -<span class="sourceLineNo">112</span> private int[] stackIndexes = null;<a name="line.112"></a> -<span class="sourceLineNo">113</span> private int childrenLatch = 0;<a name="line.113"></a> -<span class="sourceLineNo">114</span><a name="line.114"></a> -<span class="sourceLineNo">115</span> private volatile int timeout = NO_TIMEOUT;<a name="line.115"></a> -<span class="sourceLineNo">116</span> private volatile long lastUpdate;<a name="line.116"></a> -<span class="sourceLineNo">117</span><a name="line.117"></a> -<span class="sourceLineNo">118</span> private volatile byte[] result = null;<a name="line.118"></a> +<span class="sourceLineNo">084</span> * <p>Procedures can be suspended or put in wait state with a callback that gets executed on<a name="line.84"></a> +<span class="sourceLineNo">085</span> * Procedure-specified timeout. See {@link #setTimeout(int)}}, and<a name="line.85"></a> +<span class="sourceLineNo">086</span> * {@link #setTimeoutFailure(Object)}. See TestProcedureEvents and the<a name="line.86"></a> +<span class="sourceLineNo">087</span> * TestTimeoutEventProcedure class for an example usage.</p><a name="line.87"></a> +<span class="sourceLineNo">088</span> *<a name="line.88"></a> +<span class="sourceLineNo">089</span> * <p>There are hooks for collecting metrics on submit of the procedure and on finish.<a name="line.89"></a> +<span class="sourceLineNo">090</span> * See {@link #updateMetricsOnSubmit(Object)} and<a name="line.90"></a> +<span class="sourceLineNo">091</span> * {@link #updateMetricsOnFinish(Object, long, boolean)}.<a name="line.91"></a> +<span class="sourceLineNo">092</span> */<a name="line.92"></a> +<span class="sourceLineNo">093</span>@InterfaceAudience.Private<a name="line.93"></a> +<span class="sourceLineNo">094</span>@InterfaceStability.Evolving<a name="line.94"></a> +<span class="sourceLineNo">095</span>public abstract class Procedure<TEnvironment> implements Comparable<Procedure<TEnvironment>> {<a name="line.95"></a> +<span class="sourceLineNo">096</span> private static final Logger LOG = LoggerFactory.getLogger(Procedure.class);<a name="line.96"></a> +<span class="sourceLineNo">097</span> public static final long NO_PROC_ID = -1;<a name="line.97"></a> +<span class="sourceLineNo">098</span> protected static final int NO_TIMEOUT = -1;<a name="line.98"></a> +<span class="sourceLineNo">099</span><a name="line.99"></a> +<span class="sourceLineNo">100</span> public enum LockState {<a name="line.100"></a> +<span class="sourceLineNo">101</span> LOCK_ACQUIRED, // Lock acquired and ready to execute<a name="line.101"></a> +<span class="sourceLineNo">102</span> LOCK_YIELD_WAIT, // Lock not acquired, framework needs to yield<a name="line.102"></a> +<span class="sourceLineNo">103</span> LOCK_EVENT_WAIT, // Lock not acquired, an event will yield the procedure<a name="line.103"></a> +<span class="sourceLineNo">104</span> }<a name="line.104"></a> +<span class="sourceLineNo">105</span><a name="line.105"></a> +<span class="sourceLineNo">106</span> // Unchanged after initialization<a name="line.106"></a> +<span class="sourceLineNo">107</span> private NonceKey nonceKey = null;<a name="line.107"></a> +<span class="sourceLineNo">108</span> private String owner = null;<a name="line.108"></a> +<span class="sourceLineNo">109</span> private long parentProcId = NO_PROC_ID;<a name="line.109"></a> +<span class="sourceLineNo">110</span> private long rootProcId = NO_PROC_ID;<a name="line.110"></a> +<span class="sourceLineNo">111</span> private long procId = NO_PROC_ID;<a name="line.111"></a> +<span class="sourceLineNo">112</span> private long submittedTime;<a name="line.112"></a> +<span class="sourceLineNo">113</span><a name="line.113"></a> +<span class="sourceLineNo">114</span> // Runtime state, updated every operation<a name="line.114"></a> +<span class="sourceLineNo">115</span> private ProcedureState state = ProcedureState.INITIALIZING;<a name="line.115"></a> +<span class="sourceLineNo">116</span> private RemoteProcedureException exception = null;<a name="line.116"></a> +<span class="sourceLineNo">117</span> private int[] stackIndexes = null;<a name="line.117"></a> +<span class="sourceLineNo">118</span> private int childrenLatch = 0;<a name="line.118"></a> <span class="sourceLineNo">119</span><a name="line.119"></a> -<span class="sourceLineNo">120</span> /**<a name="line.120"></a> -<span class="sourceLineNo">121</span> * The main code of the procedure. It must be idempotent since execute()<a name="line.121"></a> -<span class="sourceLineNo">122</span> * may be called multiple times in case of machine failure in the middle<a name="line.122"></a> -<span class="sourceLineNo">123</span> * of the execution.<a name="line.123"></a> -<span class="sourceLineNo">124</span> * @param env the environment passed to the ProcedureExecutor<a name="line.124"></a> -<span class="sourceLineNo">125</span> * @return a set of sub-procedures to run or ourselves if there is more work to do or null if the<a name="line.125"></a> -<span class="sourceLineNo">126</span> * procedure is done.<a name="line.126"></a> -<span class="sourceLineNo">127</span> * @throws ProcedureYieldException the procedure will be added back to the queue and retried later.<a name="line.127"></a> -<span class="sourceLineNo">128</span> * @throws InterruptedException the procedure will be added back to the queue and retried later.<a name="line.128"></a> -<span class="sourceLineNo">129</span> * @throws ProcedureSuspendedException Signal to the executor that Procedure has suspended itself and<a name="line.129"></a> -<span class="sourceLineNo">130</span> * has set itself up waiting for an external event to wake it back up again.<a name="line.130"></a> -<span class="sourceLineNo">131</span> */<a name="line.131"></a> -<span class="sourceLineNo">132</span> protected abstract Procedure<TEnvironment>[] execute(TEnvironment env)<a name="line.132"></a> -<span class="sourceLineNo">133</span> throws ProcedureYieldException, ProcedureSuspendedException, InterruptedException;<a name="line.133"></a> -<span class="sourceLineNo">134</span><a name="line.134"></a> -<span class="sourceLineNo">135</span> /**<a name="line.135"></a> -<span class="sourceLineNo">136</span> * The code to undo what was done by the execute() code.<a name="line.136"></a> -<span class="sourceLineNo">137</span> * It is called when the procedure or one of the sub-procedures failed or an<a name="line.137"></a> -<span class="sourceLineNo">138</span> * abort was requested. It should cleanup all the resources created by<a name="line.138"></a> -<span class="sourceLineNo">139</span> * the execute() call. The implementation must be idempotent since rollback()<a name="line.139"></a> -<span class="sourceLineNo">140</span> * may be called multiple time in case of machine failure in the middle<a name="line.140"></a> -<span class="sourceLineNo">141</span> * of the execution.<a name="line.141"></a> -<span class="sourceLineNo">142</span> * @param env the environment passed to the ProcedureExecutor<a name="line.142"></a> -<span class="sourceLineNo">143</span> * @throws IOException temporary failure, the rollback will retry later<a name="line.143"></a> -<span class="sourceLineNo">144</span> * @throws InterruptedException the procedure will be added back to the queue and retried later<a name="line.144"></a> -<span class="sourceLineNo">145</span> */<a name="line.145"></a> -<span class="sourceLineNo">146</span> protected abstract void rollback(TEnvironment env)<a name="line.146"></a> -<span class="sourceLineNo">147</span> throws IOException, InterruptedException;<a name="line.147"></a> -<span class="sourceLineNo">148</span><a name="line.148"></a> -<span class="sourceLineNo">149</span> /**<a name="line.149"></a> -<span class="sourceLineNo">150</span> * The abort() call is asynchronous and each procedure must decide how to deal<a name="line.150"></a> -<span class="sourceLineNo">151</span> * with it, if they want to be abortable. The simplest implementation<a name="line.151"></a> -<span class="sourceLineNo">152</span> * is to have an AtomicBoolean set in the abort() method and then the execute()<a name="line.152"></a> -<span class="sourceLineNo">153</span> * will check if the abort flag is set or not.<a name="line.153"></a> -<span class="sourceLineNo">154</span> * abort() may be called multiple times from the client, so the implementation<a name="line.154"></a> -<span class="sourceLineNo">155</span> * must be idempotent.<a name="line.155"></a> -<span class="sourceLineNo">156</span> *<a name="line.156"></a> -<span class="sourceLineNo">157</span> * <p>NOTE: abort() is not like Thread.interrupt(). It is just a notification<a name="line.157"></a> -<span class="sourceLineNo">158</span> * that allows the procedure implementor abort.<a name="line.158"></a> -<span class="sourceLineNo">159</span> */<a name="line.159"></a> -<span class="sourceLineNo">160</span> protected abstract boolean abort(TEnvironment env);<a name="line.160"></a> -<span class="sourceLineNo">161</span><a name="line.161"></a> -<span class="sourceLineNo">162</span> /**<a name="line.162"></a> -<span class="sourceLineNo">163</span> * The user-level code of the procedure may have some state to<a name="line.163"></a> -<span class="sourceLineNo">164</span> * persist (e.g. input arguments or current position in the processing state) to<a name="line.164"></a> -<span class="sourceLineNo">165</span> * be able to resume on failure.<a name="line.165"></a> -<span class="sourceLineNo">166</span> * @param serializer stores the serializable state<a name="line.166"></a> -<span class="sourceLineNo">167</span> */<a name="line.167"></a> -<span class="sourceLineNo">168</span> protected abstract void serializeStateData(final ProcedureStateSerializer serializer)<a name="line.168"></a> -<span class="sourceLineNo">169</span> throws IOException;<a name="line.169"></a> -<span class="sourceLineNo">170</span><a name="line.170"></a> -<span class="sourceLineNo">171</span> /**<a name="line.171"></a> -<span class="sourceLineNo">172</span> * Called on store load to allow the user to decode the previously serialized<a name="line.172"></a> -<span class="sourceLineNo">173</span> * state.<a name="line.173"></a> -<span class="sourceLineNo">174</span> * @param serializer contains the serialized state<a name="line.174"></a> -<span class="sourceLineNo">175</span> */<a name="line.175"></a> -<span class="sourceLineNo">176</span> protected abstract void deserializeStateData(final ProcedureStateSerializer serializer)<a name="line.176"></a> -<span class="sourceLineNo">177</span> throws IOException;<a name="line.177"></a> -<span class="sourceLineNo">178</span><a name="line.178"></a> -<span class="sourceLineNo">179</span> /**<a name="line.179"></a> -<span class="sourceLineNo">180</span> * The user should override this method if they need a lock on an Entity.<a name="line.180"></a> -<span class="sourceLineNo">181</span> * A lock can be anything, and it is up to the implementor. The Procedure<a name="line.181"></a> -<span class="sourceLineNo">182</span> * Framework will call this method just before it invokes {@link #execute(Object)}.<a name="line.182"></a> -<span class="sourceLineNo">183</span> * It calls {@link #releaseLock(Object)} after the call to execute.<a name="line.183"></a> -<span class="sourceLineNo">184</span> *<a name="line.184"></a> -<span class="sourceLineNo">185</span> * <p>If you need to hold the lock for the life of the Procedure -- i.e. you do not<a name="line.185"></a> -<span class="sourceLineNo">186</span> * want any other Procedure interfering while this Procedure is running, see<a name="line.186"></a> -<span class="sourceLineNo">187</span> * {@link #holdLock(Object)}.<a name="line.187"></a> -<span class="sourceLineNo">188</span> *<a name="line.188"></a> -<span class="sourceLineNo">189</span> * <p>Example: in our Master we can execute request in parallel for different tables.<a name="line.189"></a> -<span class="sourceLineNo">190</span> * We can create t1 and create t2 and these creates can be executed at the same time.<a name="line.190"></a> -<span class="sourceLineNo">191</span> * Anything else on t1/t2 is queued waiting that specific table create to happen.<a name="line.191"></a> -<span class="sourceLineNo">192</span> *<a name="line.192"></a> -<span class="sourceLineNo">193</span> * <p>There are 3 LockState:<a name="line.193"></a> -<span class="sourceLineNo">194</span> * <ul><li>LOCK_ACQUIRED should be returned when the proc has the lock and the proc is<a name="line.194"></a> -<span class="sourceLineNo">195</span> * ready to execute.</li><a name="line.195"></a> -<span class="sourceLineNo">196</span> * <li>LOCK_YIELD_WAIT should be returned when the proc has not the lock and the framework<a name="line.196"></a> -<span class="sourceLineNo">197</span> * should take care of readding the procedure back to the runnable set for retry</li><a name="line.197"></a> -<span class="sourceLineNo">198</span> * <li>LOCK_EVENT_WAIT should be returned when the proc has not the lock and someone will<a name="line.198"></a> -<span class="sourceLineNo">199</span> * take care of readding the procedure back to the runnable set when the lock is available.<a name="line.199"></a> -<span class="sourceLineNo">200</span> * </li></ul><a name="line.200"></a> -<span class="sourceLineNo">201</span> * @return the lock state as described above.<a name="line.201"></a> -<span class="sourceLineNo">202</span> */<a name="line.202"></a> -<span class="sourceLineNo">203</span> protected LockState acquireLock(final TEnvironment env) {<a name="line.203"></a> -<span class="sourceLineNo">204</span> return LockState.LOCK_ACQUIRED;<a name="line.204"></a> -<span class="sourceLineNo">205</span> }<a name="line.205"></a> -<span class="sourceLineNo">206</span><a name="line.206"></a> -<span class="sourceLineNo">207</span> /**<a name="line.207"></a> -<span class="sourceLineNo">208</span> * The user should override this method, and release lock if necessary.<a name="line.208"></a> -<span class="sourceLineNo">209</span> */<a name="line.209"></a> -<span class="sourceLineNo">210</span> protected void releaseLock(final TEnvironment env) {<a name="line.210"></a> -<span class="sourceLineNo">211</span> // no-op<a name="line.211"></a> -<span class="sourceLineNo">212</span> }<a name="line.212"></a> -<span class="sourceLineNo">213</span><a name="line.213"></a> -<span class="sourceLineNo">214</span> /**<a name="line.214"></a> -<span class="sourceLineNo">215</span> * Used to keep the procedure lock even when the procedure is yielding or suspended.<a name="line.215"></a> -<span class="sourceLineNo">216</span> * Must implement {@link #hasLock(Object)} if you want to hold the lock for life<a name="line.216"></a> -<span class="sourceLineNo">217</span> * of the Procedure.<a name="line.217"></a> -<span class="sourceLineNo">218</span> * @see #hasLock(Object)<a name="line.218"></a> -<span class="sourceLineNo">219</span> * @return true if the procedure should hold on the lock until completionCleanup()<a name="line.219"></a> -<span class="sourceLineNo">220</span> */<a name="line.220"></a> -<span class="sourceLineNo">221</span> protected boolean holdLock(final TEnvironment env) {<a name="line.221"></a> -<span class="sourceLineNo">222</span> return false;<a name="line.222"></a> -<span class="sourceLineNo">223</span> }<a name="line.223"></a> -<span class="sourceLineNo">224</span><a name="line.224"></a> -<span class="sourceLineNo">225</span> /**<a name="line.225"></a> -<span class="sourceLineNo">226</span> * This is used in conjunction with {@link #holdLock(Object)}. If {@link #holdLock(Object)}<a name="line.226"></a> -<span class="sourceLineNo">227</span> * returns true, the procedure executor will call acquireLock() once and thereafter<a name="line.227"></a> -<span class="sourceLineNo">228</span> * not call {@link #releaseLock(Object)} until the Procedure is done (Normally, it calls<a name="line.228"></a> -<span class="sourceLineNo">229</span> * release/acquire around each invocation of {@link #execute(Object)}.<a name="line.229"></a> -<span class="sourceLineNo">230</span> * @see #holdLock(Object)<a name="line.230"></a> -<span class="sourceLineNo">231</span> * @return true if the procedure has the lock, false otherwise.<a name="line.231"></a> -<span class="sourceLineNo">232</span> */<a name="line.232"></a> -<span class="sourceLineNo">233</span> protected boolean hasLock(final TEnvironment env) {<a name="line.233"></a> -<span class="sourceLineNo">234</span> return false;<a name="line.234"></a> -<span class="sourceLineNo">235</span> }<a name="line.235"></a> -<span class="sourceLineNo">236</span><a name="line.236"></a> -<span class="sourceLineNo">237</span> /**<a name="line.237"></a> -<span class="sourceLineNo">238</span> * Called when the procedure is loaded for replay.<a name="line.238"></a> -<span class="sourceLineNo">239</span> * The procedure implementor may use this method to perform some quick<a name="line.239"></a> -<span class="sourceLineNo">240</span> * operation before replay.<a name="line.240"></a> -<span class="sourceLineNo">241</span> * e.g. failing the procedure if the state on replay may be unknown.<a name="line.241"></a> -<span class="sourceLineNo">242</span> */<a name="line.242"></a> -<span class="sourceLineNo">243</span> protected void beforeReplay(final TEnvironment env) {<a name="line.243"></a> -<span class="sourceLineNo">244</span> // no-op<a name="line.244"></a> -<span class="sourceLineNo">245</span> }<a name="line.245"></a> -<span class="sourceLineNo">246</span><a name="line.246"></a> -<span class="sourceLineNo">247</span> /**<a name="line.247"></a> -<span class="sourceLineNo">248</span> * Called when the procedure is ready to be added to the queue after<a name="line.248"></a> -<span class="sourceLineNo">249</span> * the loading/replay operation.<a name="line.249"></a> -<span class="sourceLineNo">250</span> */<a name="line.250"></a> -<span class="sourceLineNo">251</span> protected void afterReplay(final TEnvironment env) {<a name="line.251"></a> -<span class="sourceLineNo">252</span> // no-op<a name="line.252"></a> -<span class="sourceLineNo">253</span> }<a name="line.253"></a> -<span class="sourceLineNo">254</span><a name="line.254"></a> -<span class="sourceLineNo">255</span> /**<a name="line.255"></a> -<span class="sourceLineNo">256</span> * Called when the procedure is marked as completed (success or rollback).<a name="line.256"></a> -<span class="sourceLineNo">257</span> * The procedure implementor may use this method to cleanup in-memory states.<a name="line.257"></a> -<span class="sourceLineNo">258</span> * This operation will not be retried on failure. If a procedure took a lock,<a name="line.258"></a> -<span class="sourceLineNo">259</span> * it will have been released when this method runs.<a name="line.259"></a> -<span class="sourceLineNo">260</span> */<a name="line.260"></a> -<span class="sourceLineNo">261</span> protected void completionCleanup(final TEnvironment env) {<a name="line.261"></a> -<span class="sourceLineNo">262</span> // no-op<a name="line.262"></a> -<span class="sourceLineNo">263</span> }<a name="line.263"></a> -<span class="sourceLineNo">264</span><a name="line.264"></a> -<span class="sourceLineNo">265</span> /**<a name="line.265"></a> -<span class="sourceLineNo">266</span> * By default, the procedure framework/executor will try to run procedures start to finish.<a name="line.266"></a> -<span class="sourceLineNo">267</span> * Return true to make the executor yield between each execution step to<a name="line.267"></a> -<span class="sourceLineNo">268</span> * give other procedures a chance to run.<a name="line.268"></a> -<span class="sourceLineNo">269</span> * @param env the environment passed to the ProcedureExecutor<a name="line.269"></a> -<span class="sourceLineNo">270</span> * @return Return true if the executor should yield on completion of an execution step.<a name="line.270"></a> -<span class="sourceLineNo">271</span> * Defaults to return false.<a name="line.271"></a> -<span class="sourceLineNo">272</span> */<a name="line.272"></a> -<span class="sourceLineNo">273</span> protected boolean isYieldAfterExecutionStep(final TEnvironment env) {<a name="line.273"></a> -<span class="sourceLineNo">274</span> return false;<a name="line.274"></a> -<span class="sourceLineNo">275</span> }<a name="line.275"></a> -<span class="sourceLineNo">276</span><a name="line.276"></a> -<span class="sourceLineNo">277</span> /**<a name="line.277"></a> -<span class="sourceLineNo">278</span> * By default, the executor will keep the procedure result around util<a name="line.278"></a> -<span class="sourceLineNo">279</span> * the eviction TTL is expired. The client can cut down the waiting time<a name="line.279"></a> -<span class="sourceLineNo">280</span> * by requesting that the result is removed from the executor.<a name="line.280"></a> -<span class="sourceLineNo">281</span> * In case of system started procedure, we can force the executor to auto-ack.<a name="line.281"></a> -<span class="sourceLineNo">282</span> * @param env the environment passed to the ProcedureExecutor<a name="line.282"></a> -<span class="sourceLineNo">283</span> * @return true if the executor should wait the client ack for the result.<a name="line.283"></a> -<span class="sourceLineNo">284</span> * Defaults to return true.<a name="line.284"></a> -<span class="sourceLineNo">285</span> */<a name="line.285"></a> -<span class="sourceLineNo">286</span> protected boolean shouldWaitClientAck(final TEnvironment env) {<a name="line.286"></a> -<span class="sourceLineNo">287</span> return true;<a name="line.287"></a> -<span class="sourceLineNo">288</span> }<a name="line.288"></a> -<span class="sourceLineNo">289</span><a name="line.289"></a> -<span class="sourceLineNo">290</span> /**<a name="line.290"></a> -<span class="sourceLineNo">291</span> * Override this method to provide procedure specific counters for submitted count, failed<a name="line.291"></a> -<span class="sourceLineNo">292</span> * count and time histogram.<a name="line.292"></a> -<span class="sourceLineNo">293</span> * @param env The environment passed to the procedure executor<a name="line.293"></a> -<span class="sourceLineNo">294</span> * @return Container object for procedure related metric<a name="line.294"></a> -<span class="sourceLineNo">295</span> */<a name="line.295"></a> -<span class="sourceLineNo">296</span> protected ProcedureMetrics getProcedureMetrics(final TEnvironment env) {<a name="line.296"></a> -<span class="sourceLineNo">297</span> return null;<a name="line.297"></a> -<span class="sourceLineNo">298</span> }<a name="line.298"></a> -<span class="sourceLineNo">299</span><a name="line.299"></a> -<span class="sourceLineNo">300</span> /**<a name="line.300"></a> -<span class="sourceLineNo">301</span> * This function will be called just when procedure is submitted for execution. Override this<a name="line.301"></a> -<span class="sourceLineNo">302</span> * method to update the metrics at the beginning of the procedure. The default implementation<a name="line.302"></a> -<span class="sourceLineNo">303</span> * updates submitted counter if {@link #getProcedureMetrics(Object)} returns non-null<a name="line.303"></a> -<span class="sourceLineNo">304</span> * {@link ProcedureMetrics}.<a name="line.304"></a> -<span class="sourceLineNo">305</span> */<a name="line.305"></a> -<span class="sourceLineNo">306</span> protected void updateMetricsOnSubmit(final TEnvironment env) {<a name="line.306"></a> -<span class="sourceLineNo">307</span> ProcedureMetrics metrics = getProcedureMetrics(env);<a name="line.307"></a> -<span class="sourceLineNo">308</span> if (metrics == null) {<a name="line.308"></a> -<span class="sourceLineNo">309</span> return;<a name="line.309"></a> -<span class="sourceLineNo">310</span> }<a name="line.310"></a> -<span class="sourceLineNo">311</span><a name="line.311"></a> -<span class="sourceLineNo">312</span> Counter submittedCounter = metrics.getSubmittedCounter();<a name="line.312"></a> -<span class="sourceLineNo">313</span> if (submittedCounter != null) {<a name="line.313"></a> -<span class="sourceLineNo">314</span> submittedCounter.increment();<a name="line.314"></a> +<span class="sourceLineNo">120</span> private volatile int timeout = NO_TIMEOUT;<a name="line.120"></a> +<span class="sourceLineNo">121</span> private volatile long lastUpdate;<a name="line.121"></a> +<span class="sourceLineNo">122</span><a name="line.122"></a> +<span class="sourceLineNo">123</span> private volatile byte[] result = null;<a name="line.123"></a> +<span class="sourceLineNo">124</span><a name="line.124"></a> +<span class="sourceLineNo">125</span> /**<a name="line.125"></a> +<span class="sourceLineNo">126</span> * The main code of the procedure. It must be idempotent since execute()<a name="line.126"></a> +<span class="sourceLineNo">127</span> * may be called multiple times in case of machine failure in the middle<a name="line.127"></a> +<span class="sourceLineNo">128</span> * of the execution.<a name="line.128"></a> +<span class="sourceLineNo">129</span> * @param env the environment passed to the ProcedureExecutor<a name="line.129"></a> +<span class="sourceLineNo">130</span> * @return a set of sub-procedures to run or ourselves if there is more work to do or null if the<a name="line.130"></a> +<span class="sourceLineNo">131</span> * procedure is done.<a name="line.131"></a> +<span class="sourceLineNo">132</span> * @throws ProcedureYieldException the procedure will be added back to the queue and retried later.<a name="line.132"></a> +<span class="sourceLineNo">133</span> * @throws InterruptedException the procedure will be added back to the queue and retried later.<a name="line.133"></a> +<span class="sourceLineNo">134</span> * @throws ProcedureSuspendedException Signal to the executor that Procedure has suspended itself and<a name="line.134"></a> +<span class="sourceLineNo">135</span> * has set itself up waiting for an external event to wake it back up again.<a name="line.135"></a> +<span class="sourceLineNo">136</span> */<a name="line.136"></a> +<span class="sourceLineNo">137</span> protected abstract Procedure<TEnvironment>[] execute(TEnvironment env)<a name="line.137"></a> +<span class="sourceLineNo">138</span> throws ProcedureYieldException, ProcedureSuspendedException, InterruptedException;<a name="line.138"></a> +<span class="sourceLineNo">139</span><a name="line.139"></a> +<span class="sourceLineNo">140</span> /**<a name="line.140"></a> +<span class="sourceLineNo">141</span> * The code to undo what was done by the execute() code.<a name="line.141"></a> +<span class="sourceLineNo">142</span> * It is called when the procedure or one of the sub-procedures failed or an<a name="line.142"></a> +<span class="sourceLineNo">143</span> * abort was requested. It should cleanup all the resources created by<a name="line.143"></a> +<span class="sourceLineNo">144</span> * the execute() call. The implementation must be idempotent since rollback()<a name="line.144"></a> +<span class="sourceLineNo">145</span> * may be called multiple time in case of machine failure in the middle<a name="line.145"></a> +<span class="sourceLineNo">146</span> * of the execution.<a name="line.146"></a> +<span class="sourceLineNo">147</span> * @param env the environment passed to the ProcedureExecutor<a name="line.147"></a> +<span class="sourceLineNo">148</span> * @throws IOException temporary failure, the rollback will retry later<a name="line.148"></a> +<span class="sourceLineNo">149</span> * @throws InterruptedException the procedure will be added back to the queue and retried later<a name="line.149"></a> +<span class="sourceLineNo">150</span> */<a name="line.150"></a> +<span class="sourceLineNo">151</span> protected abstract void rollback(TEnvironment env)<a name="line.151"></a> +<span class="sourceLineNo">152</span> throws IOException, InterruptedException;<a name="line.152"></a> +<span class="sourceLineNo">153</span><a name="line.153"></a> +<span class="sourceLineNo">154</span> /**<a name="line.154"></a> +<span class="sourceLineNo">155</span> * The abort() call is asynchronous and each procedure must decide how to deal<a name="line.155"></a> +<span class="sourceLineNo">156</span> * with it, if they want to be abortable. The simplest implementation<a name="line.156"></a> +<span class="sourceLineNo">157</span> * is to have an AtomicBoolean set in the abort() method and then the execute()<a name="line.157"></a> +<span class="sourceLineNo">158</span> * will check if the abort flag is set or not.<a name="line.158"></a> +<span class="sourceLineNo">159</span> * abort() may be called multiple times from the client, so the implementation<a name="line.159"></a> +<span class="sourceLineNo">160</span> * must be idempotent.<a name="line.160"></a> +<span class="sourceLineNo">161</span> *<a name="line.161"></a> +<span class="sourceLineNo">162</span> * <p>NOTE: abort() is not like Thread.interrupt(). It is just a notification<a name="line.162"></a> +<span class="sourceLineNo">163</span> * that allows the procedure implementor abort.<a name="line.163"></a> +<span class="sourceLineNo">164</span> */<a name="line.164"></a> +<span class="sourceLineNo">165</span> protected abstract boolean abort(TEnvironment env);<a name="line.165"></a> +<span class="sourceLineNo">166</span><a name="line.166"></a> +<span class="sourceLineNo">167</span> /**<a name="line.167"></a> +<span class="sourceLineNo">168</span> * The user-level code of the procedure may have some state to<a name="line.168"></a> +<span class="sourceLineNo">169</span> * persist (e.g. input arguments or current position in the processing state) to<a name="line.169"></a> +<span class="sourceLineNo">170</span> * be able to resume on failure.<a name="line.170"></a> +<span class="sourceLineNo">171</span> * @param serializer stores the serializable state<a name="line.171"></a> +<span class="sourceLineNo">172</span> */<a name="line.172"></a> +<span class="sourceLineNo">173</span> protected abstract void serializeStateData(final ProcedureStateSerializer serializer)<a name="line.173"></a> +<span class="sourceLineNo">174</span> throws IOException;<a name="line.174"></a> +<span class="sourceLineNo">175</span><a name="line.175"></a> +<span class="sourceLineNo">176</span> /**<a name="line.176"></a> +<span class="sourceLineNo">177</span> * Called on store load to allow the user to decode the previously serialized<a name="line.177"></a> +<span class="sourceLineNo">178</span> * state.<a name="line.178"></a> +<span class="sourceLineNo">179</span> * @param serializer contains the serialized state<a name="line.179"></a> +<span class="sourceLineNo">180</span> */<a name="line.180"></a> +<span class="sourceLineNo">181</span> protected abstract void deserializeStateData(final ProcedureStateSerializer serializer)<a name="line.181"></a> +<span class="sourceLineNo">182</span> throws IOException;<a name="line.182"></a> +<span class="sourceLineNo">183</span><a name="line.183"></a> +<span class="sourceLineNo">184</span> /**<a name="line.184"></a> +<span class="sourceLineNo">185</span> * The user should override this method if they need a lock on an Entity.<a name="line.185"></a> +<span class="sourceLineNo">186</span> * A lock can be anything, and it is up to the implementor. The Procedure<a name="line.186"></a> +<span class="sourceLineNo">187</span> * Framework will call this method just before it invokes {@link #execute(Object)}.<a name="line.187"></a> +<span class="sourceLineNo">188</span> * It calls {@link #releaseLock(Object)} after the call to execute.<a name="line.188"></a> +<span class="sourceLineNo">189</span> *<a name="line.189"></a> +<span class="sourceLineNo">190</span> * <p>If you need to hold the lock for the life of the Procedure -- i.e. you do not<a name="line.190"></a> +<span class="sourceLineNo">191</span> * want any other Procedure interfering while this Procedure is running, see<a name="line.191"></a> +<span class="sourceLineNo">192</span> * {@link #holdLock(Object)}.<a name="line.192"></a> +<span class="sourceLineNo">193</span> *<a name="line.193"></a> +<span class="sourceLineNo">194</span> * <p>Example: in our Master we can execute request in parallel for different tables.<a name="line.194"></a> +<span class="sourceLineNo">195</span> * We can create t1 and create t2 and these creates can be executed at the same time.<a name="line.195"></a> +<span class="sourceLineNo">196</span> * Anything else on t1/t2 is queued waiting that specific table create to happen.<a name="line.196"></a> +<span class="sourceLineNo">197</span> *<a name="line.197"></a> +<span class="sourceLineNo">198</span> * <p>There are 3 LockState:<a name="line.198"></a> +<span class="sourceLineNo">199</span> * <ul><li>LOCK_ACQUIRED should be returned when the proc has the lock and the proc is<a name="line.199"></a> +<span class="sourceLineNo">200</span> * ready to execute.</li><a name="line.200"></a> +<span class="sourceLineNo">201</span> * <li>LOCK_YIELD_WAIT should be returned when the proc has not the lock and the framework<a name="line.201"></a> +<span class="sourceLineNo">202</span> * should take care of readding the procedure back to the runnable set for retry</li><a name="line.202"></a> +<span class="sourceLineNo">203</span> * <li>LOCK_EVENT_WAIT should be returned when the proc has not the lock and someone will<a name="line.203"></a> +<span class="sourceLineNo">204</span> * take care of readding the procedure back to the runnable set when the lock is available.<a name="line.204"></a> +<span class="sourceLineNo">205</span> * </li></ul><a name="line.205"></a> +<span class="sourceLineNo">206</span> * @return the lock state as described above.<a name="line.206"></a> +<span class="sourceLineNo">207</span> */<a name="line.207"></a> +<span class="sourceLineNo">208</span> protected LockState acquireLock(final TEnvironment env) {<a name="line.208"></a> +<span class="sourceLineNo">209</span> return LockState.LOCK_ACQUIRED;<a name="line.209"></a> +<span class="sourceLineNo">210</span> }<a name="line.210"></a> +<span class="sourceLineNo">211</span><a name="line.211"></a> +<span class="sourceLineNo">212</span> /**<a name="line.212"></a> +<span class="sourceLineNo">213</span> * The user should override this method, and release lock if necessary.<a name="line.213"></a> +<span class="sourceLineNo">214</span> */<a name="line.214"></a> +<span class="sourceLineNo">215</span> protected void releaseLock(final TEnvironment env) {<a name="line.215"></a> +<span class="sourceLineNo">216</span> // no-op<a name="line.216"></a> +<span class="sourceLineNo">217</span> }<a name="line.217"></a> +<span class="sourceLineNo">218</span><a name="line.218"></a> +<span class="sourceLineNo">219</span> /**<a name="line.219"></a> +<span class="sourceLineNo">220</span> * Used to keep the procedure lock even when the procedure is yielding or suspended.<a name="line.220"></a> +<span class="sourceLineNo">221</span> * Must implement {@link #hasLock(Object)} if you want to hold the lock for life<a name="line.221"></a> +<span class="sourceLineNo">222</span> * of the Procedure.<a name="line.222"></a> +<span class="sourceLineNo">223</span> * @see #hasLock(Object)<a name="line.223"></a> +<span class="sourceLineNo">224</span> * @return true if the procedure should hold on the lock until completionCleanup()<a name="line.224"></a> +<span class="sourceLineNo">225</span> */<a name="line.225"></a> +<span class="sourceLineNo">226</span> protected boolean holdLock(final TEnvironment env) {<a name="line.226"></a> +<span class="sourceLineNo">227</span> return false;<a name="line.227"></a> +<span class="sourceLineNo">228</span> }<a name="line.228"></a> +<span class="sourceLineNo">229</span><a name="line.229"></a> +<span class="sourceLineNo">230</span> /**<a name="line.230"></a> +<span class="sourceLineNo">231</span> * This is used in conjunction with {@link #holdLock(Object)}. If {@link #holdLock(Object)}<a name="line.231"></a> +<span class="sourceLineNo">232</span> * returns true, the procedure executor will call acquireLock() once and thereafter<a name="line.232"></a> +<span class="sourceLineNo">233</span> * not call {@link #releaseLock(Object)} until the Procedure is done (Normally, it calls<a name="line.233"></a> +<span class="sourceLineNo">234</span> * release/acquire around each invocation of {@link #execute(Object)}.<a name="line.234"></a> +<span class="sourceLineNo">235</span> * @see #holdLock(Object)<a name="line.235"></a> +<span class="sourceLineNo">236</span> * @return true if the procedure has the lock, false otherwise.<a name="line.236"></a> +<span class="sourceLineNo">237</span> */<a name="line.237"></a> +<span class="sourceLineNo">238</span> protected boolean hasLock(final TEnvironment env) {<a name="line.238"></a> +<span class="sourceLineNo">239</span> return false;<a name="line.239"></a> +<span class="sourceLineNo">240</span> }<a name="line.240"></a> +<span class="sourceLineNo">241</span><a name="line.241"></a> +<span class="sourceLineNo">242</span> /**<a name="line.242"></a> +<span class="sourceLineNo">243</span> * Called when the procedure is loaded for replay.<a name="line.243"></a> +<span class="sourceLineNo">244</span> * The procedure implementor may use this method to perform some quick<a name="line.244"></a> +<span class="sourceLineNo">245</span> * operation before replay.<a name="line.245"></a> +<span class="sourceLineNo">246</span> * e.g. failing the procedure if the state on replay may be unknown.<a name="line.246"></a> +<span class="sourceLineNo">247</span> */<a name="line.247"></a> +<span class="sourceLineNo">248</span> protected void beforeReplay(final TEnvironment env) {<a name="line.248"></a> +<span class="sourceLineNo">249</span> // no-op<a name="line.249"></a> +<span class="sourceLineNo">250</span> }<a name="line.250"></a> +<span class="sourceLineNo">251</span><a name="line.251"></a> +<span class="sourceLineNo">252</span> /**<a name="line.252"></a> +<span class="sourceLineNo">253</span> * Called when the procedure is ready to be added to the queue after<a name="line.253"></a> +<span class="sourceLineNo">254</span> * the loading/replay operation.<a name="line.254"></a> +<span class="sourceLineNo">255</span> */<a name="line.255"></a> +<span class="sourceLineNo">256</span> protected void afterReplay(final TEnvironment env) {<a name="line.256"></a> +<span class="sourceLineNo">257</span> // no-op<a name="line.257"></a> +<span class="sourceLineNo">258</span> }<a name="line.258"></a> +<span class="sourceLineNo">259</span><a name="line.259"></a> +<span class="sourceLineNo">260</span> /**<a name="line.260"></a> +<span class="sourceLineNo">261</span> * Called when the procedure is marked as completed (success or rollback).<a name="line.261"></a> +<span class="sourceLineNo">262</span> * The procedure implementor may use this method to cleanup in-memory states.<a name="line.262"></a> +<span class="sourceLineNo">263</span> * This operation will not be retried on failure. If a procedure took a lock,<a name="line.263"></a> +<span class="sourceLineNo">264</span> * it will have been released when this method runs.<a name="line.264"></a> +<span class="sourceLineNo">265</span> */<a name="line.265"></a> +<span class="sourceLineNo">266</span> protected void completionCleanup(final TEnvironment env) {<a name="line.266"></a> +<span class="sourceLineNo">267</span> // no-op<a name="line.267"></a> +<span class="sourceLineNo">268</span> }<a name="line.268"></a> +<span class="sourceLineNo">269</span><a name="line.269"></a> +<span class="sourceLineNo">270</span> /**<a name="line.270"></a> +<span class="sourceLineNo">271</span> * By default, the procedure framework/executor will try to run procedures start to finish.<a name="line.271"></a> +<span class="sourceLineNo">272</span> * Return true to make the executor yield between each execution step to<a name="line.272"></a> +<span class="sourceLineNo">273</span> * give other procedures a chance to run.<a name="line.273"></a> +<span class="sourceLineNo">274</span> * @param env the environment passed to the ProcedureExecutor<a name="line.274"></a> +<span class="sourceLineNo">275</span> * @return Return true if the executor should yield on completion of an execution step.<a name="line.275"></a> +<span class="sourceLineNo">276</span> * Defaults to return false.<a name="line.276"></a> +<span class="sourceLineNo">277</span> */<a name="line.277"></a> +<span class="sourceLineNo">278</span> protected boolean isYieldAfterExecutionStep(final TEnvironment env) {<a name="line.278"></a> +<span class="sourceLineNo">279</span> return false;<a name="line.279"></a> +<span class="sourceLineNo">280</span> }<a name="line.280"></a> +<span class="sourceLineNo">281</span><a name="line.281"></a> +<span class="sourceLineNo">282</span> /**<a name="line.282"></a> +<span class="sourceLineNo">283</span> * By default, the executor will keep the procedure result around util<a name="line.283"></a> +<span class="sourceLineNo">284</span> * the eviction TTL is expired. The client can cut down the waiting time<a name="line.284"></a> +<span class="sourceLineNo">285</span> * by requesting that the result is removed from the executor.<a name="line.285"></a> +<span class="sourceLineNo">286</span> * In case of system started procedure, we can force the executor to auto-ack.<a name="line.286"></a> +<span class="sourceLineNo">287</span> * @param env the environment passed to the ProcedureExecutor<a name="line.287"></a> +<span class="sourceLineNo">288</span> * @return true if the executor should wait the client ack for the result.<a name="line.288"></a> +<span class="sourceLineNo">289</span> * Defaults to return true.<a name="line.289"></a> +<span class="sourceLineNo">290</span> */<a name="line.290"></a> +<span class="sourceLineNo">291</span> protected boolean shouldWaitClientAck(final TEnvironment env) {<a name="line.291"></a> +<span class="sourceLineNo">292</span> return true;<a name="line.292"></a> +<span class="sourceLineNo">293</span> }<a name="line.293"></a> +<span class="sourceLineNo">294</span><a name="line.294"></a> +<span class="sourceLineNo">295</span> /**<a name="line.295"></a> +<span class="sourceLineNo">296</span> * Override this method to provide procedure specific counters for submitted count, failed<a name="line.296"></a> +<span class="sourceLineNo">297</span> * count and time histogram.<a name="line.297"></a> +<span class="sourceLineNo">298</span> * @param env The environment passed to the procedure executor<a name="line.298"></a> +<span class="sourceLineNo">299</span> * @return Container object for procedure related metric<a name="line.299"></a> +<span class="sourceLineNo">300</span> */<a name="line.300"></a> +<span class="sourceLineNo">301</span> protected ProcedureMetrics getProcedureMetrics(final TEnvironment env) {<a name="line.301"></a> +<span class="sourceLineNo">302</span> return null;<a name="line.302"></a> +<span class="sourceLineNo">303</span> }<a name="line.303"></a> +<span class="sourceLineNo">304</span><a name="line.304"></a> +<span class="sourceLineNo">305</span> /**<a name="line.305"></a> +<span class="sourceLineNo">306</span> * This function will be called just when procedure is submitted for execution. Override this<a name="line.306"></a> +<span class="sourceLineNo">307</span> * method to update the metrics at the beginning of the procedure. The default implementation<a name="line.307"></a> +<span class="sourceLineNo">308</span> * updates submitted counter if {@link #getProcedureMetrics(Object)} returns non-null<a name="line.308"></a> +<span class="sourceLineNo">309</span> * {@link ProcedureMetrics}.<a name="line.309"></a> +<span class="sourceLineNo">310</span> */<a name="line.310"></a> +<span class="sourceLineNo">311</span> protected void updateMetricsOnSubmit(final TEnvironment env) {<a name="line.311"></a> +<span class="sourceLineNo">312</span> ProcedureMetrics metrics = getProcedureMetrics(env);<a name="line.312"></a> +<span class="sourceLineNo">313</span> if (metrics == null) {<a name="line.313"></a> +<span class="sourceLineNo">314</span> return;<a name="line.314"></a> <span class="sourceLineNo">315</span> }<a name="line.315"></a> -<span class="sourceLineNo">316</span> }<a name="line.316"></a> -<span class="sourceLineNo">317</span><a name="line.317"></a> -<span class="sourceLineNo">318</span> /**<a name="line.318"></a> -<span class="sourceLineNo">319</span> * This function will be called just after procedure execution is finished. Override this method<a name="line.319"></a> -<span class="sourceLineNo">320</span> * to update metrics at the end of the procedure. If {@link #getProcedureMetrics(Object)}<a name="line.320"></a> -<span class="sourceLineNo">321</span> * returns non-null {@link ProcedureMetrics}, the default implementation adds runtime of a<a name="line.321"></a> -<span class="sourceLineNo">322</span> * procedure to a time histogram for successfully completed procedures. Increments failed<a name="line.322"></a> -<span class="sourceLineNo">323</span> * counter for failed procedures.<a name="line.323"></a> -<span class="sourceLineNo">324</span> *<a name="line.324"></a> -<span class="sourceLineNo">325</span> * TODO: As any of the sub-procedures on failure rolls back all procedures in the stack,<a name="line.325"></a> -<span class="sourceLineNo">326</span> * including successfully finished siblings, this function may get called twice in certain<a name="line.326"></a> -<span class="sourceLineNo">327</span> * cases for certain procedures. Explore further if this can be called once.<a name="line.327"></a> -<span class="sourceLineNo">328</span> *<a name="line.328"></a> -<span class="sourceLineNo">329</span> * @param env The environment passed to the procedure executor<a name="line.329"></a> -<span class="sourceLineNo">330</span> * @param runtime Runtime of the procedure in milliseconds<a name="line.330"></a> -<span class="sourceLineNo">331</span> * @param success true if procedure is completed successfully<a name="line.331"></a> -<span class="sourceLineNo">332</span> */<a name="line.332"></a> -<span class="sourceLineNo">333</span> protected void updateMetricsOnFinish(final TEnvironment env, final long runtime,<a name="line.333"></a> -<span class="sourceLineNo">334</span> boolean success) {<a name="line.334"></a> -<span class="sourceLineNo">335</span> ProcedureMetrics metrics = getProcedureMetrics(env);<a name="line.335"></a> -<span class="sourceLineNo">336</span> if (metrics == null) {<a name="line.336"></a> -<span class="sourceLineNo">337</span> return;<a name="line.337"></a> -<span class="sourceLineNo">338</span> }<a name="line.338"></a> -<span class="sourceLineNo">339</span><a name="line.339"></a> -<span class="sourceLineNo">340</span> if (success) {<a name="line.340"></a> -<span class="sourceLineNo">341</span> Histogram timeHisto = metrics.getTimeHisto();<a name="line.341"></a> -<span class="sourceLineNo">342</span> if (timeHisto != null) {<a name="line.342"></a> -<span class="sourceLineNo">343</span> timeHisto.update(runtime);<a name="line.343"></a> -<span class="sourceLineNo">344</span> }<a name="line.344"></a> -<span class="sourceLineNo">345</span> } else {<a name="line.345"></a> -<span class="sourceLineNo">346</span> Counter failedCounter = metrics.getFailedCounter();<a name="line.346"></a> -<span class="sourceLineNo">347</span> if (failedCounter != null) {<a name="line.347"></a> -<span class="sourceLineNo">348</span> failedCounter.increment();<a name="line.348"></a> +<span class="sourceLineNo">316</span><a name="line.316"></a> +<span class="sourceLineNo">317</span> Counter submittedCounter = metrics.getSubmittedCounter();<a name="line.317"></a> +<span class="sourceLineNo">318</span> if (submittedCounter != null) {<a name="line.318"></a> +<span class="sourceLineNo">319</span> submittedCounter.increment();<a name="line.319"></a> +<span class="sourceLineNo">320</span> }<a name="line.320"></a> +<span class="sourceLineNo">321</span> }<a name="line.321"></a> +<span class="sourceLineNo">322</span><a name="line.322"></a> +<span class="sourceLineNo">323</span> /**<a name="line.323"></a> +<span class="sourceLineNo">324</span> * This function will be called just after procedure execution is finished. Override this method<a name="line.324"></a> +<span class="sourceLineNo">325</span> * to update metrics at the end of the procedure. If {@link #getProcedureMetrics(Object)}<a name="line.325"></a> +<span class="sourceLineNo">326</span> * returns non-null {@link ProcedureMetrics}, the default implementation adds runtime of a<a name="line.326"></a> +<span class="sourceLineNo">327</span> * procedure to a time histogram for successfully completed procedures. Increments failed<a name="line.327"></a> +<span class="sourceLineNo">328</span> * counter for failed procedures.<a name="line.328"></a> +<span class="sourceLineNo">329</span> *<a name="line.329"></a> +<span class="sourceLineNo">330</span> * TODO: As any of the sub-procedures on failure rolls back all procedures in the stack,<a name="line.330"></a> +<span class="sourceLineNo">331</span> * including successfully finished siblings, this function may get called twice in certain<a name="line.331"></a> +<span class="sourceLineNo">332</span> * cases for certain procedures. Explore further if this can be called once.<a name="line.332"></a> +<span class="sourceLineNo">333</span> *<a name="line.333"></a> +<span class="sourceLineNo">334</span> * @param env The environment passed to the procedure executor<a name="line.334"></a> +<span class="sourceLineNo">335</span> * @param runtime Runtime of the procedure in milliseconds<a name="line.335"></a> +<span class="sourceLineNo">336</span> * @param success true if procedure is completed successfully<a name="line.336"></a> +<span class="sourceLineNo">337</span> */<a name="line.337"></a> +<span class="sourceLineNo">338</span> protected void updateMetricsOnFinish(final TEnvironment env, final long runtime,<a name="line.338"></a> +<span class="sourceLineNo">339</span> boolean success) {<a name="line.339"></a> +<span class="sourceLineNo">340</span> ProcedureMetrics metrics = getProcedureMetrics(env);<a name="line.340"></a> +<span class="sourceLineNo">341</span> if (metrics == null) {<a name="line.341"></a> +<span 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name="line.366"></a> +<span class="sourceLineNo">367</span> * @return the StringBuilder<a name="line.367"></a> +<span class="sourceLineNo">368</span> */<a name="line.368"></a> +<span class="sourceLineNo">369</span> protected StringBuilder toStringSimpleSB() {<a name="line.369"></a> +<span class="sourceLineNo">370</span> final StringBuilder sb = new StringBuilder();<a name="line.370"></a> +<span class="sourceLineNo">371</span><a name="line.371"></a> +<span class="sourceLineNo">372</span> sb.append("pid=");<a name="line.372"></a> +<span class="sourceLineNo">373</span> sb.append(getProcId());<a name="line.373"></a> <span class="sourceLineNo">374</span><a name="line.374"></a> -<span class="sourceLineNo">375</span> /**<a name="line.375"></a> -<span class="sourceLineNo">376</span> * TODO<a name="line.376"></a> -<span class="sourceLineNo">377</span> * Enable later when this is being used.<a name="line.377"></a> -<span class="sourceLineNo">378</span> * Currently owner not used.<a 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interpolating {@link Procedure} State.<a name="line.427"></a> -<span class="sourceLineNo">428</span> * Allows decorating generic Procedure State with Procedure particulars.<a name="line.428"></a> -<span class="sourceLineNo">429</span> * @param builder Append current {@link ProcedureState}<a name="line.429"></a> -<span class="sourceLineNo">430</span> */<a name="line.430"></a> -<span class="sourceLineNo">431</span> protected void toStringState(StringBuilder builder) {<a name="line.431"></a> -<span class="sourceLineNo">432</span> builder.append(getState());<a name="line.432"></a> -<span class="sourceLineNo">433</span> }<a name="line.433"></a> -<span class="sourceLineNo">434</span><a name="line.434"></a> -<span class="sourceLineNo">435</span> /**<a name="line.435"></a> -<span class="sourceLineNo">436</span> * Extend the toString() information with the procedure details<a name="line.436"></a> -<span class="sourceLineNo">437</span> * e.g. className and parameters<a name="line.437"></a> 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name="line.402"></a> +<span class="sourceLineNo">403</span> * Extend the toString() information with more procedure<a name="line.403"></a> +<span class="sourceLineNo">404</span> * details<a name="line.404"></a> +<span class="sourceLineNo">405</span> */<a name="line.405"></a> +<span class="sourceLineNo">406</span> public String toStringDetails() {<a name="line.406"></a> +<span class="sourceLineNo">407</span> final StringBuilder sb = toStringSimpleSB();<a name="line.407"></a> +<span class="sourceLineNo">408</span><a name="line.408"></a> +<span class="sourceLineNo">409</span> sb.append(" submittedTime=");<a name="line.409"></a> +<span class="sourceLineNo">410</span> sb.append(getSubmittedTime());<a name="line.410"></a> +<span class="sourceLineNo">411</span><a name="line.411"></a> +<span class="sourceLineNo">412</span> sb.append(", lastUpdate=");<a name="line.412"></a> +<span class="sourceLineNo">413</span> sb.append(getLastUpdate());<a name="line.413"></a> +<span 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+<span class="sourceLineNo">448</span><a name="line.448"></a> +<span class="sourceLineNo">449</span> // ==========================================================================<a name="line.449"></a> +<span class="sourceLineNo">450</span> // Those fields are unchanged after initialization.<a name="line.450"></a> +<span class="sourceLineNo">451</span> //<a name="line.451"></a> +<span class="sourceLineNo">452</span> // Each procedure will get created from the user or during<a name="line.452"></a> +<span class="sourceLineNo">453</span> // ProcedureExecutor.start() during the load() phase and then submitted<a name="line.453"></a> +<span class="sourceLineNo">454</span> // to the executor. these fields will never be changed after initialization<a name="line.454"></a> +<span class="sourceLineNo">455</span> // ==========================================================================<a name="line.455"></a> +<span class="sourceLineNo">456</span> public long getProcId() {<a name="line.456"></a> +<span class="sourceLineNo">457</span> return procId;<a name="line.457"></a> +<span class="sourceLineNo">458</span> }<a name="line.458"></a> +<span class="sourceLineNo">459</span><a name="line.459"></a> +<span class="sourceLineNo">460</span> public boolean hasParent() {<a name="line.460"></a> +<span class="sourceLineNo">461</span> return parentProcId != NO_PROC_ID;<a name="line.461"></a> +<span class="sourceLineNo">462</span> }<a name="line.462"></a> +<span class="sourceLineNo">463</span><a name="line.463"></a> +<span class="sourceLineNo">464</span> public long getParentProcId() {<a name="line.464"></a> +<span class="sourceLineNo">465</span> return parentProcId;<a name="line.465"></a> +<span class="sourceLineNo">466</span> }<a name="line.466"></a> +<span class="sourceLineNo">467</span><a name="line.467"></a> +<span class="sourceLineNo">468</span> public long getRootProcId() {<a name="line.468"></a> +<span class="sourceLineNo">469</span> return rootProcId;<a name="line.469"></a> +<span class="sourceLineNo">470</span> }<a name="line.470"></a> +<span class="sourceLineNo">471</span><a name="line.471"></a> +<span class="sourceLineNo">472</span> public String getProcName() {<a name="line.472"></a> +<span class="sourceLineNo">473</span> return toStringClass();<a name="line.473"></a> +<span class="sourceLineNo">474</span> }<a name="line.474"></a> +<span class="sourceLineNo">475</span><a name="line.475"></a> +<span class="sourceLineNo">476</span> public NonceKey getNonceKey() {<a name="line.476"></a> +<span class="sourceLineNo">477</span> return nonceKey;<a name="line.477"></a> +<span class="sourceLineNo">478</span> }<a name="line.478"></a> +<span class="sourceLineNo">479</span><a name="line.479"></a> +<span class="sourceLineNo">480</span> public long getSubmittedTime() {<a name="line.480"></a> +<span class="sourceLineNo">481</span> return submittedTime;<a name="line.481"></a> +<span class="sourceLineNo">482</span> }<a name="line.482"></a> +<span class="sourceLineNo">483</span><a name="line.483"></a> +<span class="sourceLineNo">484</span> public String getOwner() {<a name="line.484"></a> +<span class="sourceLineNo">485</span> return owner;<a name="line.485"></a> +<span class="sourceLineNo">486</span> }<a name="line.486"></a> +<span class="sourceLineNo">487</span><a name="line.487"></a> +<span class="sourceLineNo">488</span> public boolean hasOwner() {<a name="line.488"></a> +<span class="sourceLineNo">489</span> return owner != null;<a name="line.489"></a> +<span class="sourceLineNo">490</span> }<a name="line.490"></a> +<span class="sourceLineNo">491</span><a name="line.491"></a> +<span class="sourceLineNo">492</span> /**<a name="line.492"></a> +<span class="sourceLineNo">493</span> * Called by the ProcedureExecutor to assign the ID to the newly created procedure.<a name="line.493"></a> +<span class="sourceLineNo">494</span> */<a name="line.494"></a> +<span class="sourceLineNo">495</span> @VisibleForTesting<a name="line.495"></a> +<span class="sourceLineNo">496</span> @InterfaceAudience.Private<a name="line.496"></a> +<span class="sourceLineNo">497</span> protected void setProcId(final long procId) {<a name="line.497"></a> +<span class="sourceLineNo">498</span> this.procId = procId;<a name="line.498"></a> +<span class="sourceLineNo">499</span> this.submittedTime = EnvironmentEdgeManager.currentTime();<a name="line.499"></a> +<span class="sourceLineNo">500</span> setState(ProcedureState.RUNNABLE);<a name="line.500"></a> +<span class="sourceLineNo">501</span> }<a name="line.501"></a> +<span class="sourceLineNo">502</span><a name="line.502"></a> +<span class="sourceLineNo">503</span> /**<a name="line.503"></a> +<span class="sourceLineNo">504</span> * Called by the ProcedureExecutor to assign the parent to the newly created procedure.<a name="line.504"></a> +<span class="sourceLineNo">505</span> */<a name="line.505"></a> <span class="sourceLineNo">506</span> @InterfaceAudience.Private<a name="line.506"></a> -<span class="sourceLineNo">507</span> protected void setRootProcId(final long rootProcId) {<a name="line.507"></a> -<span class="sourceLineNo">508</span> this.rootProcId = rootProcId;<a name="line.508"></a> +<span class="sourceLineNo">507</span> protected void setParentProcId(final long parentProcId) {<a name="line.507"></a> +<span class="sourceLineNo">508</span> this.parentProcId = parentProcId;<a name="line.508"></a> <span class="sourceLineNo">509</span> }<a name="line.509"></a> <span class="sourceLineNo">510</span><a name="line.510"></a> -<span class="sourceLineNo">511</span> /**<a name="line.511"></a> -<span class="sourceLineNo">512</span> * Called by the ProcedureExecutor to set the value to the newly created procedure.<a name="line.512"></a> -<span class="sourceLineNo">513</span> */<a name="line.513"></a> -<span class="sourceLineNo">514</span> @VisibleForTesting<a name="line.514"></a> -<span class="sourceLineNo">515</span> @InterfaceAudience.Private<a name="line.515"></a> -<span class="sourceLineNo">516</span> protected void setNonceKey(final NonceKey nonceKey) {<a name="line.516"></a> -<span class="sourceLineNo">517</span> this.nonceKey = nonceKey;<a name="line.517"></a> -<span class="sourceLineNo">518</span> }<a name="line.518"></a> -<span class="sourceLineNo">519</span><a name="line.519"></a> -<span class="sourceLineNo">520</span> @VisibleForTesting<a name="line.520"></a> -<span class="sourceLineNo">521</span> @InterfaceAudience.Private<a name="line.521"></a> -<span class="sourceLineNo">522</span> public void setOwner(final String owner) {<a name="line.522"></a> -<span class="sourceLineNo">523</span> this.owner = StringUtils.isEmpty(owner) ? null : owner;<a name="line.523"></a> -<span class="sourceLineNo">524</span> }<a name="line.524"></a> -<span class="sourceLineNo">525</span><a name="line.525"></a> -<span class="sourceLineNo">526</span> public void setOwner(final User owner) {<a name="line.526"></a> -<span 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// ==========================================================================<a name="line.542"></a> -<span class="sourceLineNo">543</span> /**<a name="line.543"></a> -<span class="sourceLineNo">544</span> * @param timeout timeout interval in msec<a name="line.544"></a> -<span class="sourceLineNo">545</span> */<a name="line.545"></a> -<span class="sourceLineNo">546</span> protected void setTimeout(final int timeout) {<a name="line.546"></a> -<span class="sourceLineNo">547</span> this.timeout = timeout;<a name="line.547"></a> -<span class="sourceLineNo">548</span> }<a name="line.548"></a> -<span class="sourceLineNo">549</span><a name="line.549"></a> -<span class="sourceLineNo">550</span> public boolean hasTimeout() {<a name="line.550"></a> -<span class="sourceLineNo">551</span> return timeout != NO_TIMEOUT;<a name="line.551"></a> -<span class="sourceLineNo">552</span> }<a name="line.552"></a> -<span class="sourceLineNo">553</span><a name="line.5
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