http://git-wip-us.apache.org/repos/asf/hbase-site/blob/6eb695c8/devapidocs/src-html/org/apache/hadoop/hbase/procedure2/StateMachineProcedure.html ---------------------------------------------------------------------- diff --git a/devapidocs/src-html/org/apache/hadoop/hbase/procedure2/StateMachineProcedure.html b/devapidocs/src-html/org/apache/hadoop/hbase/procedure2/StateMachineProcedure.html index 6a77cc8..7654a0e 100644 --- a/devapidocs/src-html/org/apache/hadoop/hbase/procedure2/StateMachineProcedure.html +++ b/devapidocs/src-html/org/apache/hadoop/hbase/procedure2/StateMachineProcedure.html @@ -82,250 +82,251 @@ <span class="sourceLineNo">074</span> */<a name="line.74"></a> <span class="sourceLineNo">075</span> private int previousState;<a name="line.75"></a> <span class="sourceLineNo">076</span><a name="line.76"></a> -<span class="sourceLineNo">077</span> protected enum Flow {<a name="line.77"></a> -<span class="sourceLineNo">078</span> HAS_MORE_STATE,<a name="line.78"></a> -<span class="sourceLineNo">079</span> NO_MORE_STATE,<a name="line.79"></a> -<span class="sourceLineNo">080</span> }<a name="line.80"></a> -<span class="sourceLineNo">081</span><a name="line.81"></a> -<span class="sourceLineNo">082</span> /**<a name="line.82"></a> -<span class="sourceLineNo">083</span> * called to perform a single step of the specified 'state' of the procedure<a name="line.83"></a> -<span class="sourceLineNo">084</span> * @param state state to execute<a name="line.84"></a> -<span class="sourceLineNo">085</span> * @return Flow.NO_MORE_STATE if the procedure is completed,<a name="line.85"></a> -<span class="sourceLineNo">086</span> * Flow.HAS_MORE_STATE if there is another step.<a name="line.86"></a> -<span class="sourceLineNo">087</span> */<a name="line.87"></a> -<span class="sourceLineNo">088</span> protected abstract Flow executeFromState(TEnvironment env, TState state)<a name="line.88"></a> -<span class="sourceLineNo">089</span> throws ProcedureSuspendedException, ProcedureYieldException, InterruptedException;<a name="line.89"></a> -<span class="sourceLineNo">090</span><a name="line.90"></a> -<span class="sourceLineNo">091</span> /**<a name="line.91"></a> -<span class="sourceLineNo">092</span> * called to perform the rollback of the specified state<a name="line.92"></a> -<span class="sourceLineNo">093</span> * @param state state to rollback<a name="line.93"></a> -<span class="sourceLineNo">094</span> * @throws IOException temporary failure, the rollback will retry later<a name="line.94"></a> -<span class="sourceLineNo">095</span> */<a name="line.95"></a> -<span class="sourceLineNo">096</span> protected abstract void rollbackState(TEnvironment env, TState state)<a name="line.96"></a> -<span class="sourceLineNo">097</span> throws IOException, InterruptedException;<a name="line.97"></a> -<span class="sourceLineNo">098</span><a name="line.98"></a> -<span class="sourceLineNo">099</span> /**<a name="line.99"></a> -<span class="sourceLineNo">100</span> * Convert an ordinal (or state id) to an Enum (or more descriptive) state object.<a name="line.100"></a> -<span class="sourceLineNo">101</span> * @param stateId the ordinal() of the state enum (or state id)<a name="line.101"></a> -<span class="sourceLineNo">102</span> * @return the state enum object<a name="line.102"></a> -<span class="sourceLineNo">103</span> */<a name="line.103"></a> -<span class="sourceLineNo">104</span> protected abstract TState getState(int stateId);<a name="line.104"></a> -<span class="sourceLineNo">105</span><a name="line.105"></a> -<span class="sourceLineNo">106</span> /**<a name="line.106"></a> -<span class="sourceLineNo">107</span> * Convert the Enum (or more descriptive) state object to an ordinal (or state id).<a name="line.107"></a> -<span class="sourceLineNo">108</span> * @param state the state enum object<a name="line.108"></a> -<span class="sourceLineNo">109</span> * @return stateId the ordinal() of the state enum (or state id)<a name="line.109"></a> -<span class="sourceLineNo">110</span> */<a name="line.110"></a> -<span class="sourceLineNo">111</span> protected abstract int getStateId(TState state);<a name="line.111"></a> -<span class="sourceLineNo">112</span><a name="line.112"></a> -<span class="sourceLineNo">113</span> /**<a name="line.113"></a> -<span class="sourceLineNo">114</span> * Return the initial state object that will be used for the first call to executeFromState().<a name="line.114"></a> -<span class="sourceLineNo">115</span> * @return the initial state enum object<a name="line.115"></a> -<span class="sourceLineNo">116</span> */<a name="line.116"></a> -<span class="sourceLineNo">117</span> protected abstract TState getInitialState();<a name="line.117"></a> -<span class="sourceLineNo">118</span><a name="line.118"></a> -<span class="sourceLineNo">119</span> /**<a name="line.119"></a> -<span class="sourceLineNo">120</span> * Set the next state for the procedure.<a name="line.120"></a> -<span class="sourceLineNo">121</span> * @param state the state enum object<a name="line.121"></a> -<span class="sourceLineNo">122</span> */<a name="line.122"></a> -<span class="sourceLineNo">123</span> protected void setNextState(final TState state) {<a name="line.123"></a> -<span class="sourceLineNo">124</span> setNextState(getStateId(state));<a name="line.124"></a> -<span class="sourceLineNo">125</span> failIfAborted();<a name="line.125"></a> -<span class="sourceLineNo">126</span> }<a name="line.126"></a> -<span class="sourceLineNo">127</span><a name="line.127"></a> -<span class="sourceLineNo">128</span> /**<a name="line.128"></a> -<span class="sourceLineNo">129</span> * By default, the executor will try ro run all the steps of the procedure start to finish.<a name="line.129"></a> -<span class="sourceLineNo">130</span> * Return true to make the executor yield between execution steps to<a name="line.130"></a> -<span class="sourceLineNo">131</span> * give other procedures time to run their steps.<a name="line.131"></a> -<span class="sourceLineNo">132</span> * @param state the state we are going to execute next.<a name="line.132"></a> -<span class="sourceLineNo">133</span> * @return Return true if the executor should yield before the execution of the specified step.<a name="line.133"></a> -<span class="sourceLineNo">134</span> * Defaults to return false.<a name="line.134"></a> -<span class="sourceLineNo">135</span> */<a name="line.135"></a> -<span class="sourceLineNo">136</span> protected boolean isYieldBeforeExecuteFromState(TEnvironment env, TState state) {<a name="line.136"></a> -<span class="sourceLineNo">137</span> return false;<a name="line.137"></a> -<span class="sourceLineNo">138</span> }<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> * Add a child procedure to execute<a name="line.141"></a> -<span class="sourceLineNo">142</span> * @param subProcedure the child procedure<a name="line.142"></a> -<span class="sourceLineNo">143</span> */<a name="line.143"></a> -<span class="sourceLineNo">144</span> protected void addChildProcedure(Procedure<TEnvironment>... subProcedure) {<a name="line.144"></a> -<span class="sourceLineNo">145</span> if (subProcedure == null) return;<a name="line.145"></a> -<span class="sourceLineNo">146</span> final int len = subProcedure.length;<a name="line.146"></a> -<span class="sourceLineNo">147</span> if (len == 0) return;<a name="line.147"></a> -<span class="sourceLineNo">148</span> if (subProcList == null) {<a name="line.148"></a> -<span class="sourceLineNo">149</span> subProcList = new ArrayList<>(len);<a name="line.149"></a> -<span class="sourceLineNo">150</span> }<a name="line.150"></a> -<span class="sourceLineNo">151</span> for (int i = 0; i < len; ++i) {<a name="line.151"></a> -<span class="sourceLineNo">152</span> Procedure<TEnvironment> proc = subProcedure[i];<a name="line.152"></a> -<span class="sourceLineNo">153</span> if (!proc.hasOwner()) proc.setOwner(getOwner());<a name="line.153"></a> -<span class="sourceLineNo">154</span> subProcList.add(proc);<a name="line.154"></a> -<span class="sourceLineNo">155</span> }<a name="line.155"></a> -<span class="sourceLineNo">156</span> }<a name="line.156"></a> -<span class="sourceLineNo">157</span><a name="line.157"></a> -<span class="sourceLineNo">158</span> @Override<a name="line.158"></a> -<span class="sourceLineNo">159</span> protected Procedure[] execute(final TEnvironment env)<a name="line.159"></a> -<span class="sourceLineNo">160</span> throws ProcedureSuspendedException, ProcedureYieldException, InterruptedException {<a name="line.160"></a> -<span class="sourceLineNo">161</span> updateTimestamp();<a name="line.161"></a> -<span class="sourceLineNo">162</span> try {<a name="line.162"></a> -<span class="sourceLineNo">163</span> failIfAborted();<a name="line.163"></a> -<span class="sourceLineNo">164</span><a name="line.164"></a> -<span class="sourceLineNo">165</span> if (!hasMoreState() || isFailed()) return null;<a name="line.165"></a> -<span class="sourceLineNo">166</span> TState state = getCurrentState();<a name="line.166"></a> -<span class="sourceLineNo">167</span> if (stateCount == 0) {<a name="line.167"></a> -<span class="sourceLineNo">168</span> setNextState(getStateId(state));<a name="line.168"></a> -<span class="sourceLineNo">169</span> }<a name="line.169"></a> -<span class="sourceLineNo">170</span><a name="line.170"></a> -<span class="sourceLineNo">171</span> if (LOG.isTraceEnabled()) {<a name="line.171"></a> -<span class="sourceLineNo">172</span> LOG.trace(state + " " + this + "; cycles=" + this.cycles);<a name="line.172"></a> -<span class="sourceLineNo">173</span> }<a name="line.173"></a> -<span class="sourceLineNo">174</span> // Keep running count of cycles<a name="line.174"></a> -<span class="sourceLineNo">175</span> if (getStateId(state) != this.previousState) {<a name="line.175"></a> -<span class="sourceLineNo">176</span> this.previousState = getStateId(state);<a name="line.176"></a> -<span class="sourceLineNo">177</span> this.cycles = 0;<a name="line.177"></a> -<span class="sourceLineNo">178</span> } else {<a name="line.178"></a> -<span class="sourceLineNo">179</span> this.cycles++;<a name="line.179"></a> -<span class="sourceLineNo">180</span> }<a name="line.180"></a> -<span class="sourceLineNo">181</span><a name="line.181"></a> -<span class="sourceLineNo">182</span> LOG.trace("{}", toString());<a name="line.182"></a> -<span class="sourceLineNo">183</span> stateFlow = executeFromState(env, state);<a name="line.183"></a> -<span class="sourceLineNo">184</span> if (!hasMoreState()) setNextState(EOF_STATE);<a name="line.184"></a> -<span class="sourceLineNo">185</span> if (subProcList != null && !subProcList.isEmpty()) {<a name="line.185"></a> -<span class="sourceLineNo">186</span> Procedure[] subProcedures = subProcList.toArray(new Procedure[subProcList.size()]);<a name="line.186"></a> -<span class="sourceLineNo">187</span> subProcList = null;<a name="line.187"></a> -<span class="sourceLineNo">188</span> return subProcedures;<a name="line.188"></a> -<span class="sourceLineNo">189</span> }<a name="line.189"></a> -<span class="sourceLineNo">190</span> return (isWaiting() || isFailed() || !hasMoreState()) ? null : new Procedure[] {this};<a name="line.190"></a> -<span class="sourceLineNo">191</span> } finally {<a name="line.191"></a> -<span class="sourceLineNo">192</span> updateTimestamp();<a name="line.192"></a> -<span class="sourceLineNo">193</span> }<a name="line.193"></a> -<span class="sourceLineNo">194</span> }<a name="line.194"></a> -<span class="sourceLineNo">195</span><a name="line.195"></a> -<span class="sourceLineNo">196</span> @Override<a name="line.196"></a> -<span class="sourceLineNo">197</span> protected void rollback(final TEnvironment env)<a name="line.197"></a> -<span class="sourceLineNo">198</span> throws IOException, InterruptedException {<a name="line.198"></a> -<span class="sourceLineNo">199</span> if (isEofState()) stateCount--;<a name="line.199"></a> -<span class="sourceLineNo">200</span> try {<a name="line.200"></a> -<span class="sourceLineNo">201</span> updateTimestamp();<a name="line.201"></a> -<span class="sourceLineNo">202</span> rollbackState(env, getCurrentState());<a name="line.202"></a> -<span class="sourceLineNo">203</span> stateCount--;<a name="line.203"></a> -<span class="sourceLineNo">204</span> } finally {<a name="line.204"></a> -<span class="sourceLineNo">205</span> updateTimestamp();<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><a name="line.208"></a> -<span class="sourceLineNo">209</span> private boolean isEofState() {<a name="line.209"></a> -<span class="sourceLineNo">210</span> 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class="sourceLineNo">284</span><a name="line.284"></a> -<span class="sourceLineNo">285</span> @Override<a name="line.285"></a> -<span class="sourceLineNo">286</span> protected void toStringState(StringBuilder builder) {<a name="line.286"></a> -<span class="sourceLineNo">287</span> super.toStringState(builder);<a name="line.287"></a> -<span class="sourceLineNo">288</span> if (!isFinished() && !isEofState() && getCurrentState() != null) {<a name="line.288"></a> -<span class="sourceLineNo">289</span> builder.append(":").append(getCurrentState());<a name="line.289"></a> -<span class="sourceLineNo">290</span> }<a name="line.290"></a> -<span class="sourceLineNo">291</span> }<a name="line.291"></a> -<span class="sourceLineNo">292</span><a name="line.292"></a> -<span class="sourceLineNo">293</span> @Override<a name="line.293"></a> -<span class="sourceLineNo">294</span> protected void serializeStateData(ProcedureStateSerializer serializer)<a name="line.294"></a> -<span class="sourceLineNo">295</span> throws IOException {<a name="line.295"></a> -<span class="sourceLineNo">296</span> StateMachineProcedureData.Builder data = StateMachineProcedureData.newBuilder();<a name="line.296"></a> -<span class="sourceLineNo">297</span> for (int i = 0; i < stateCount; ++i) {<a name="line.297"></a> -<span class="sourceLineNo">298</span> data.addState(states[i]);<a name="line.298"></a> -<span class="sourceLineNo">299</span> }<a name="line.299"></a> -<span class="sourceLineNo">300</span> serializer.serialize(data.build());<a name="line.300"></a> -<span class="sourceLineNo">301</span> }<a name="line.301"></a> -<span class="sourceLineNo">302</span><a name="line.302"></a> -<span class="sourceLineNo">303</span> @Override<a name="line.303"></a> -<span class="sourceLineNo">304</span> protected void deserializeStateData(ProcedureStateSerializer serializer)<a name="line.304"></a> -<span class="sourceLineNo">305</span> throws IOException {<a name="line.305"></a> -<span class="sourceLineNo">306</span> StateMachineProcedureData data = serializer.deserialize(StateMachineProcedureData.class);<a name="line.306"></a> -<span class="sourceLineNo">307</span> stateCount = data.getStateCount();<a name="line.307"></a> -<span class="sourceLineNo">308</span> if (stateCount > 0) {<a name="line.308"></a> -<span class="sourceLineNo">309</span> states = new int[stateCount];<a name="line.309"></a> -<span class="sourceLineNo">310</span> for (int i = 0; i < stateCount; ++i) {<a name="line.310"></a> -<span class="sourceLineNo">311</span> states[i] = data.getState(i);<a name="line.311"></a> -<span class="sourceLineNo">312</span> }<a name="line.312"></a> -<span class="sourceLineNo">313</span> if (isEofState()) {<a name="line.313"></a> -<span class="sourceLineNo">314</span> stateFlow = Flow.NO_MORE_STATE;<a name="line.314"></a> -<span class="sourceLineNo">315</span> }<a name="line.315"></a> -<span class="sourceLineNo">316</span> } else {<a name="line.316"></a> -<span class="sourceLineNo">317</span> states = null;<a name="line.317"></a> -<span class="sourceLineNo">318</span> }<a name="line.318"></a> -<span class="sourceLineNo">319</span> }<a name="line.319"></a> -<span class="sourceLineNo">320</span>}<a name="line.320"></a> +<span class="sourceLineNo">077</span> @VisibleForTesting<a name="line.77"></a> +<span class="sourceLineNo">078</span> public enum Flow {<a name="line.78"></a> +<span class="sourceLineNo">079</span> HAS_MORE_STATE,<a name="line.79"></a> +<span class="sourceLineNo">080</span> NO_MORE_STATE,<a name="line.80"></a> +<span class="sourceLineNo">081</span> }<a name="line.81"></a> +<span class="sourceLineNo">082</span><a name="line.82"></a> +<span class="sourceLineNo">083</span> /**<a name="line.83"></a> +<span class="sourceLineNo">084</span> * called to perform a single step of the specified 'state' of the procedure<a name="line.84"></a> +<span class="sourceLineNo">085</span> * @param state state to execute<a name="line.85"></a> +<span class="sourceLineNo">086</span> * @return Flow.NO_MORE_STATE if the procedure is completed,<a name="line.86"></a> +<span class="sourceLineNo">087</span> * Flow.HAS_MORE_STATE if there is another step.<a name="line.87"></a> +<span class="sourceLineNo">088</span> */<a name="line.88"></a> +<span class="sourceLineNo">089</span> protected abstract Flow executeFromState(TEnvironment env, TState state)<a name="line.89"></a> +<span class="sourceLineNo">090</span> throws ProcedureSuspendedException, ProcedureYieldException, InterruptedException;<a name="line.90"></a> +<span class="sourceLineNo">091</span><a name="line.91"></a> +<span class="sourceLineNo">092</span> /**<a name="line.92"></a> +<span class="sourceLineNo">093</span> * called to perform the rollback of the specified state<a name="line.93"></a> +<span class="sourceLineNo">094</span> * @param state state to rollback<a name="line.94"></a> +<span class="sourceLineNo">095</span> * @throws IOException temporary failure, the rollback will retry later<a name="line.95"></a> +<span class="sourceLineNo">096</span> */<a name="line.96"></a> +<span class="sourceLineNo">097</span> protected abstract void rollbackState(TEnvironment env, TState state)<a name="line.97"></a> +<span class="sourceLineNo">098</span> throws IOException, InterruptedException;<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> * Convert an ordinal (or state id) to an Enum (or more descriptive) state object.<a name="line.101"></a> +<span class="sourceLineNo">102</span> * @param stateId the ordinal() of the state enum (or state id)<a name="line.102"></a> +<span class="sourceLineNo">103</span> * @return the state enum object<a name="line.103"></a> +<span class="sourceLineNo">104</span> */<a name="line.104"></a> +<span class="sourceLineNo">105</span> protected abstract TState getState(int stateId);<a name="line.105"></a> +<span class="sourceLineNo">106</span><a name="line.106"></a> +<span class="sourceLineNo">107</span> /**<a name="line.107"></a> +<span class="sourceLineNo">108</span> * Convert the Enum (or more descriptive) state object to an ordinal (or state id).<a name="line.108"></a> +<span class="sourceLineNo">109</span> * @param state the state enum object<a name="line.109"></a> +<span class="sourceLineNo">110</span> * @return stateId the ordinal() of the state enum (or state id)<a name="line.110"></a> +<span class="sourceLineNo">111</span> */<a name="line.111"></a> +<span class="sourceLineNo">112</span> protected abstract int getStateId(TState state);<a name="line.112"></a> +<span class="sourceLineNo">113</span><a name="line.113"></a> +<span class="sourceLineNo">114</span> /**<a name="line.114"></a> +<span class="sourceLineNo">115</span> * Return the initial state object that will be used for the first call to executeFromState().<a name="line.115"></a> +<span class="sourceLineNo">116</span> * @return the initial state enum object<a name="line.116"></a> +<span class="sourceLineNo">117</span> */<a name="line.117"></a> +<span class="sourceLineNo">118</span> protected abstract TState getInitialState();<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> * Set the next state for the procedure.<a name="line.121"></a> +<span class="sourceLineNo">122</span> * @param state the state enum object<a name="line.122"></a> +<span class="sourceLineNo">123</span> */<a name="line.123"></a> +<span class="sourceLineNo">124</span> protected void setNextState(final TState state) {<a name="line.124"></a> +<span class="sourceLineNo">125</span> setNextState(getStateId(state));<a name="line.125"></a> +<span class="sourceLineNo">126</span> failIfAborted();<a name="line.126"></a> +<span class="sourceLineNo">127</span> }<a name="line.127"></a> +<span class="sourceLineNo">128</span><a name="line.128"></a> +<span class="sourceLineNo">129</span> /**<a name="line.129"></a> +<span class="sourceLineNo">130</span> * By default, the executor will try ro run all the steps of the procedure start to finish.<a name="line.130"></a> +<span class="sourceLineNo">131</span> * Return true to make the executor yield between execution steps to<a name="line.131"></a> +<span class="sourceLineNo">132</span> * give other procedures time to run their steps.<a name="line.132"></a> +<span class="sourceLineNo">133</span> * @param state the state we are going to execute next.<a name="line.133"></a> +<span class="sourceLineNo">134</span> * @return Return true if the executor should yield before the execution of the specified step.<a name="line.134"></a> +<span class="sourceLineNo">135</span> * Defaults to return false.<a name="line.135"></a> +<span class="sourceLineNo">136</span> */<a name="line.136"></a> +<span class="sourceLineNo">137</span> protected boolean isYieldBeforeExecuteFromState(TEnvironment env, TState state) {<a name="line.137"></a> +<span class="sourceLineNo">138</span> return false;<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> /**<a name="line.141"></a> +<span class="sourceLineNo">142</span> * Add a child procedure to execute<a name="line.142"></a> +<span class="sourceLineNo">143</span> * @param subProcedure the child procedure<a name="line.143"></a> +<span class="sourceLineNo">144</span> */<a name="line.144"></a> +<span class="sourceLineNo">145</span> protected void addChildProcedure(Procedure<TEnvironment>... subProcedure) {<a name="line.145"></a> +<span class="sourceLineNo">146</span> if (subProcedure == null) return;<a name="line.146"></a> +<span class="sourceLineNo">147</span> final int len = subProcedure.length;<a name="line.147"></a> +<span class="sourceLineNo">148</span> if (len == 0) return;<a name="line.148"></a> +<span class="sourceLineNo">149</span> if (subProcList == null) {<a name="line.149"></a> +<span class="sourceLineNo">150</span> subProcList = new ArrayList<>(len);<a name="line.150"></a> +<span class="sourceLineNo">151</span> }<a name="line.151"></a> +<span class="sourceLineNo">152</span> for (int i = 0; i < len; ++i) {<a name="line.152"></a> +<span class="sourceLineNo">153</span> Procedure<TEnvironment> proc = subProcedure[i];<a name="line.153"></a> +<span class="sourceLineNo">154</span> if (!proc.hasOwner()) proc.setOwner(getOwner());<a name="line.154"></a> +<span class="sourceLineNo">155</span> subProcList.add(proc);<a name="line.155"></a> +<span class="sourceLineNo">156</span> }<a name="line.156"></a> +<span class="sourceLineNo">157</span> }<a name="line.157"></a> +<span class="sourceLineNo">158</span><a name="line.158"></a> +<span class="sourceLineNo">159</span> @Override<a name="line.159"></a> +<span class="sourceLineNo">160</span> protected Procedure[] execute(final TEnvironment env)<a name="line.160"></a> +<span class="sourceLineNo">161</span> throws ProcedureSuspendedException, ProcedureYieldException, InterruptedException {<a name="line.161"></a> +<span class="sourceLineNo">162</span> updateTimestamp();<a name="line.162"></a> +<span class="sourceLineNo">163</span> try {<a name="line.163"></a> +<span class="sourceLineNo">164</span> failIfAborted();<a name="line.164"></a> +<span class="sourceLineNo">165</span><a name="line.165"></a> +<span class="sourceLineNo">166</span> if (!hasMoreState() || isFailed()) return null;<a name="line.166"></a> +<span class="sourceLineNo">167</span> TState state = getCurrentState();<a name="line.167"></a> +<span class="sourceLineNo">168</span> if (stateCount == 0) {<a name="line.168"></a> +<span class="sourceLineNo">169</span> setNextState(getStateId(state));<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> if (LOG.isTraceEnabled()) {<a name="line.172"></a> +<span class="sourceLineNo">173</span> LOG.trace(state + " " + this + "; cycles=" + this.cycles);<a name="line.173"></a> +<span class="sourceLineNo">174</span> }<a name="line.174"></a> +<span class="sourceLineNo">175</span> // Keep running count of cycles<a name="line.175"></a> +<span class="sourceLineNo">176</span> if (getStateId(state) != this.previousState) {<a name="line.176"></a> +<span class="sourceLineNo">177</span> this.previousState = getStateId(state);<a name="line.177"></a> +<span class="sourceLineNo">178</span> this.cycles = 0;<a name="line.178"></a> +<span class="sourceLineNo">179</span> } else {<a name="line.179"></a> +<span class="sourceLineNo">180</span> this.cycles++;<a name="line.180"></a> +<span class="sourceLineNo">181</span> }<a name="line.181"></a> +<span class="sourceLineNo">182</span><a name="line.182"></a> +<span class="sourceLineNo">183</span> LOG.trace("{}", toString());<a name="line.183"></a> +<span class="sourceLineNo">184</span> stateFlow = executeFromState(env, state);<a name="line.184"></a> +<span class="sourceLineNo">185</span> if (!hasMoreState()) setNextState(EOF_STATE);<a name="line.185"></a> +<span class="sourceLineNo">186</span> if (subProcList != null && !subProcList.isEmpty()) {<a name="line.186"></a> +<span class="sourceLineNo">187</span> Procedure[] subProcedures = subProcList.toArray(new Procedure[subProcList.size()]);<a name="line.187"></a> +<span class="sourceLineNo">188</span> subProcList = null;<a name="line.188"></a> +<span class="sourceLineNo">189</span> return subProcedures;<a name="line.189"></a> +<span class="sourceLineNo">190</span> }<a name="line.190"></a> +<span class="sourceLineNo">191</span> return (isWaiting() || isFailed() || !hasMoreState()) ? null : new Procedure[] {this};<a name="line.191"></a> +<span class="sourceLineNo">192</span> } finally {<a name="line.192"></a> +<span class="sourceLineNo">193</span> updateTimestamp();<a name="line.193"></a> +<span class="sourceLineNo">194</span> }<a name="line.194"></a> +<span class="sourceLineNo">195</span> }<a name="line.195"></a> +<span class="sourceLineNo">196</span><a name="line.196"></a> +<span class="sourceLineNo">197</span> @Override<a name="line.197"></a> +<span class="sourceLineNo">198</span> protected void rollback(final TEnvironment env)<a name="line.198"></a> +<span class="sourceLineNo">199</span> throws IOException, InterruptedException {<a name="line.199"></a> +<span class="sourceLineNo">200</span> if (isEofState()) stateCount--;<a name="line.200"></a> +<span class="sourceLineNo">201</span> try {<a name="line.201"></a> +<span class="sourceLineNo">202</span> updateTimestamp();<a name="line.202"></a> +<span class="sourceLineNo">203</span> rollbackState(env, getCurrentState());<a name="line.203"></a> +<span class="sourceLineNo">204</span> stateCount--;<a name="line.204"></a> +<span class="sourceLineNo">205</span> } finally {<a name="line.205"></a> +<span class="sourceLineNo">206</span> updateTimestamp();<a name="line.206"></a> +<span class="sourceLineNo">207</span> }<a name="line.207"></a> +<span class="sourceLineNo">208</span> }<a name="line.208"></a> +<span class="sourceLineNo">209</span><a name="line.209"></a> +<span class="sourceLineNo">210</span> private boolean isEofState() {<a name="line.210"></a> +<span class="sourceLineNo">211</span> return stateCount > 0 && states[stateCount-1] == EOF_STATE;<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> @Override<a name="line.214"></a> +<span class="sourceLineNo">215</span> protected boolean abort(final TEnvironment env) {<a name="line.215"></a> +<span class="sourceLineNo">216</span> LOG.debug("Abort requested for {}", this);<a name="line.216"></a> +<span class="sourceLineNo">217</span> if (hasMoreState()) {<a name="line.217"></a> +<span class="sourceLineNo">218</span> aborted.set(true);<a name="line.218"></a> +<span class="sourceLineNo">219</span> return true;<a name="line.219"></a> +<span class="sourceLineNo">220</span> }<a name="line.220"></a> +<span class="sourceLineNo">221</span> LOG.debug("Ignoring abort request on {}", this);<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> * If procedure has more states then abort it otherwise procedure is finished and abort can be<a name="line.226"></a> +<span class="sourceLineNo">227</span> * ignored.<a name="line.227"></a> +<span class="sourceLineNo">228</span> */<a name="line.228"></a> +<span class="sourceLineNo">229</span> protected final void failIfAborted() {<a name="line.229"></a> +<span class="sourceLineNo">230</span> if (aborted.get()) {<a name="line.230"></a> +<span class="sourceLineNo">231</span> if (hasMoreState()) {<a name="line.231"></a> +<span class="sourceLineNo">232</span> setAbortFailure(getClass().getSimpleName(), "abort requested");<a name="line.232"></a> +<span class="sourceLineNo">233</span> } else {<a name="line.233"></a> +<span class="sourceLineNo">234</span> LOG.warn("Ignoring abort request on state='" + getCurrentState() + "' for " + this);<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><a name="line.238"></a> +<span class="sourceLineNo">239</span> /**<a name="line.239"></a> +<span class="sourceLineNo">240</span> * Used by the default implementation of abort() to know if the current state can be aborted<a name="line.240"></a> +<span class="sourceLineNo">241</span> * and rollback can be triggered.<a name="line.241"></a> +<span class="sourceLineNo">242</span> */<a name="line.242"></a> +<span class="sourceLineNo">243</span> protected boolean isRollbackSupported(final TState state) {<a name="line.243"></a> +<span class="sourceLineNo">244</span> return false;<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> @Override<a name="line.247"></a> +<span class="sourceLineNo">248</span> protected boolean isYieldAfterExecutionStep(final TEnvironment env) {<a name="line.248"></a> +<span class="sourceLineNo">249</span> return isYieldBeforeExecuteFromState(env, getCurrentState());<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> private boolean hasMoreState() {<a name="line.252"></a> +<span class="sourceLineNo">253</span> return stateFlow != Flow.NO_MORE_STATE;<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> protected TState getCurrentState() {<a name="line.256"></a> +<span class="sourceLineNo">257</span> return stateCount > 0 ? getState(states[stateCount-1]) : getInitialState();<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> * This method is used from test code as it cannot be assumed that state transition will happen<a name="line.261"></a> +<span class="sourceLineNo">262</span> * sequentially. Some procedures may skip steps/ states, some may add intermediate steps in<a name="line.262"></a> +<span class="sourceLineNo">263</span> * future.<a name="line.263"></a> +<span class="sourceLineNo">264</span> */<a name="line.264"></a> +<span class="sourceLineNo">265</span> @VisibleForTesting<a name="line.265"></a> +<span class="sourceLineNo">266</span> public int getCurrentStateId() {<a name="line.266"></a> +<span class="sourceLineNo">267</span> return getStateId(getCurrentState());<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> * Set the next state for the procedure.<a name="line.271"></a> +<span class="sourceLineNo">272</span> * @param stateId the ordinal() of the state enum (or state id)<a name="line.272"></a> +<span class="sourceLineNo">273</span> */<a name="line.273"></a> +<span class="sourceLineNo">274</span> private void setNextState(final int stateId) {<a name="line.274"></a> +<span class="sourceLineNo">275</span> if (states == null || states.length == stateCount) {<a name="line.275"></a> +<span class="sourceLineNo">276</span> int newCapacity = stateCount + 8;<a name="line.276"></a> +<span class="sourceLineNo">277</span> if (states != null) {<a name="line.277"></a> +<span class="sourceLineNo">278</span> states = Arrays.copyOf(states, newCapacity);<a name="line.278"></a> +<span class="sourceLineNo">279</span> } else {<a name="line.279"></a> +<span class="sourceLineNo">280</span> states = new int[newCapacity];<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> states[stateCount++] = stateId;<a name="line.283"></a> +<span class="sourceLineNo">284</span> }<a name="line.284"></a> +<span class="sourceLineNo">285</span><a name="line.285"></a> +<span class="sourceLineNo">286</span> @Override<a name="line.286"></a> +<span class="sourceLineNo">287</span> protected void toStringState(StringBuilder builder) {<a name="line.287"></a> +<span class="sourceLineNo">288</span> super.toStringState(builder);<a name="line.288"></a> +<span class="sourceLineNo">289</span> if (!isFinished() && !isEofState() && getCurrentState() != null) {<a name="line.289"></a> +<span class="sourceLineNo">290</span> builder.append(":").append(getCurrentState());<a name="line.290"></a> +<span class="sourceLineNo">291</span> }<a name="line.291"></a> +<span class="sourceLineNo">292</span> }<a name="line.292"></a> +<span class="sourceLineNo">293</span><a name="line.293"></a> +<span class="sourceLineNo">294</span> @Override<a name="line.294"></a> +<span class="sourceLineNo">295</span> protected void serializeStateData(ProcedureStateSerializer serializer)<a name="line.295"></a> +<span class="sourceLineNo">296</span> throws IOException {<a name="line.296"></a> +<span class="sourceLineNo">297</span> StateMachineProcedureData.Builder data = StateMachineProcedureData.newBuilder();<a name="line.297"></a> +<span class="sourceLineNo">298</span> for (int i = 0; i < stateCount; ++i) {<a name="line.298"></a> +<span class="sourceLineNo">299</span> data.addState(states[i]);<a name="line.299"></a> +<span class="sourceLineNo">300</span> }<a name="line.300"></a> +<span class="sourceLineNo">301</span> serializer.serialize(data.build());<a name="line.301"></a> +<span class="sourceLineNo">302</span> }<a name="line.302"></a> +<span class="sourceLineNo">303</span><a name="line.303"></a> +<span class="sourceLineNo">304</span> @Override<a name="line.304"></a> +<span class="sourceLineNo">305</span> protected void deserializeStateData(ProcedureStateSerializer serializer)<a name="line.305"></a> +<span class="sourceLineNo">306</span> throws IOException {<a name="line.306"></a> +<span class="sourceLineNo">307</span> StateMachineProcedureData data = serializer.deserialize(StateMachineProcedureData.class);<a name="line.307"></a> +<span class="sourceLineNo">308</span> stateCount = data.getStateCount();<a name="line.308"></a> +<span class="sourceLineNo">309</span> if (stateCount > 0) {<a name="line.309"></a> +<span class="sourceLineNo">310</span> states = new int[stateCount];<a name="line.310"></a> +<span class="sourceLineNo">311</span> for (int i = 0; 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