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| <pre><span class="sourceLineNo">001</span>/*<a name="line.1"></a> |
| <span class="sourceLineNo">002</span> * Licensed to the Apache Software Foundation (ASF) under one<a name="line.2"></a> |
| <span class="sourceLineNo">003</span> * or more contributor license agreements. See the NOTICE file<a name="line.3"></a> |
| <span class="sourceLineNo">004</span> * distributed with this work for additional information<a name="line.4"></a> |
| <span class="sourceLineNo">005</span> * regarding copyright ownership. The ASF licenses this file<a name="line.5"></a> |
| <span class="sourceLineNo">006</span> * to you under the Apache License, Version 2.0 (the<a name="line.6"></a> |
| <span class="sourceLineNo">007</span> * "License"); you may not use this file except in compliance<a name="line.7"></a> |
| <span class="sourceLineNo">008</span> * with the License. You may obtain a copy of the License at<a name="line.8"></a> |
| <span class="sourceLineNo">009</span> *<a name="line.9"></a> |
| <span class="sourceLineNo">010</span> * http://www.apache.org/licenses/LICENSE-2.0<a name="line.10"></a> |
| <span class="sourceLineNo">011</span> *<a name="line.11"></a> |
| <span class="sourceLineNo">012</span> * Unless required by applicable law or agreed to in writing,<a name="line.12"></a> |
| <span class="sourceLineNo">013</span> * software distributed under the License is distributed on an<a name="line.13"></a> |
| <span class="sourceLineNo">014</span> * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY<a name="line.14"></a> |
| <span class="sourceLineNo">015</span> * KIND, either express or implied. See the License for the<a name="line.15"></a> |
| <span class="sourceLineNo">016</span> * specific language governing permissions and limitations<a name="line.16"></a> |
| <span class="sourceLineNo">017</span> * under the License.<a name="line.17"></a> |
| <span class="sourceLineNo">018</span> *<a name="line.18"></a> |
| <span class="sourceLineNo">019</span> */<a name="line.19"></a> |
| <span class="sourceLineNo">020</span>package org.apache.mina.statemachine;<a name="line.20"></a> |
| <span class="sourceLineNo">021</span><a name="line.21"></a> |
| <span class="sourceLineNo">022</span>import java.util.Collection;<a name="line.22"></a> |
| <span class="sourceLineNo">023</span>import java.util.Collections;<a name="line.23"></a> |
| <span class="sourceLineNo">024</span>import java.util.HashMap;<a name="line.24"></a> |
| <span class="sourceLineNo">025</span>import java.util.LinkedList;<a name="line.25"></a> |
| <span class="sourceLineNo">026</span>import java.util.List;<a name="line.26"></a> |
| <span class="sourceLineNo">027</span>import java.util.Map;<a name="line.27"></a> |
| <span class="sourceLineNo">028</span>import java.util.Stack;<a name="line.28"></a> |
| <span class="sourceLineNo">029</span><a name="line.29"></a> |
| <span class="sourceLineNo">030</span>import org.apache.mina.statemachine.context.StateContext;<a name="line.30"></a> |
| <span class="sourceLineNo">031</span>import org.apache.mina.statemachine.event.Event;<a name="line.31"></a> |
| <span class="sourceLineNo">032</span>import org.apache.mina.statemachine.event.UnhandledEventException;<a name="line.32"></a> |
| <span class="sourceLineNo">033</span>import org.apache.mina.statemachine.transition.SelfTransition;<a name="line.33"></a> |
| <span class="sourceLineNo">034</span>import org.apache.mina.statemachine.transition.Transition;<a name="line.34"></a> |
| <span class="sourceLineNo">035</span>import org.slf4j.Logger;<a name="line.35"></a> |
| <span class="sourceLineNo">036</span>import org.slf4j.LoggerFactory;<a name="line.36"></a> |
| <span class="sourceLineNo">037</span><a name="line.37"></a> |
| <span class="sourceLineNo">038</span>/**<a name="line.38"></a> |
| <span class="sourceLineNo">039</span> * Represents a complete state machine. Contains a collection of {@link State}<a name="line.39"></a> |
| <span class="sourceLineNo">040</span> * objects connected by {@link Transition}s. Normally you wouldn't create <a name="line.40"></a> |
| <span class="sourceLineNo">041</span> * instances of this class directly but rather use the <a name="line.41"></a> |
| <span class="sourceLineNo">042</span> * {@link org.apache.mina.statemachine.annotation.State} annotation to define<a name="line.42"></a> |
| <span class="sourceLineNo">043</span> * your states and then let {@link StateMachineFactory} create a <a name="line.43"></a> |
| <span class="sourceLineNo">044</span> * {@link StateMachine} for you.<a name="line.44"></a> |
| <span class="sourceLineNo">045</span> *<a name="line.45"></a> |
| <span class="sourceLineNo">046</span> * @author <a href="http://mina.apache.org">Apache MINA Project</a><a name="line.46"></a> |
| <span class="sourceLineNo">047</span> */<a name="line.47"></a> |
| <span class="sourceLineNo">048</span>public class StateMachine {<a name="line.48"></a> |
| <span class="sourceLineNo">049</span> private static final Logger LOGGER = LoggerFactory.getLogger(StateMachine.class);<a name="line.49"></a> |
| <span class="sourceLineNo">050</span><a name="line.50"></a> |
| <span class="sourceLineNo">051</span> private static final String CALL_STACK = StateMachine.class.getName() + ".callStack";<a name="line.51"></a> |
| <span class="sourceLineNo">052</span><a name="line.52"></a> |
| <span class="sourceLineNo">053</span> private final State startState;<a name="line.53"></a> |
| <span class="sourceLineNo">054</span><a name="line.54"></a> |
| <span class="sourceLineNo">055</span> private final Map<String, State> states;<a name="line.55"></a> |
| <span class="sourceLineNo">056</span><a name="line.56"></a> |
| <span class="sourceLineNo">057</span> private final ThreadLocal<Boolean> processingThreadLocal = new ThreadLocal<Boolean>() {<a name="line.57"></a> |
| <span class="sourceLineNo">058</span> protected Boolean initialValue() {<a name="line.58"></a> |
| <span class="sourceLineNo">059</span> return Boolean.FALSE;<a name="line.59"></a> |
| <span class="sourceLineNo">060</span> }<a name="line.60"></a> |
| <span class="sourceLineNo">061</span> };<a name="line.61"></a> |
| <span class="sourceLineNo">062</span><a name="line.62"></a> |
| <span class="sourceLineNo">063</span> private final ThreadLocal<LinkedList<Event>> eventQueueThreadLocal = new ThreadLocal<LinkedList<Event>>() {<a name="line.63"></a> |
| <span class="sourceLineNo">064</span> protected LinkedList<Event> initialValue() {<a name="line.64"></a> |
| <span class="sourceLineNo">065</span> return new LinkedList<Event>();<a name="line.65"></a> |
| <span class="sourceLineNo">066</span> }<a name="line.66"></a> |
| <span class="sourceLineNo">067</span> };<a name="line.67"></a> |
| <span class="sourceLineNo">068</span><a name="line.68"></a> |
| <span class="sourceLineNo">069</span> /**<a name="line.69"></a> |
| <span class="sourceLineNo">070</span> * Creates a new instance using the specified {@link State}s and start<a name="line.70"></a> |
| <span class="sourceLineNo">071</span> * state.<a name="line.71"></a> |
| <span class="sourceLineNo">072</span> * <a name="line.72"></a> |
| <span class="sourceLineNo">073</span> * @param states the {@link State}s.<a name="line.73"></a> |
| <span class="sourceLineNo">074</span> * @param startStateId the id of the start {@link State}.<a name="line.74"></a> |
| <span class="sourceLineNo">075</span> */<a name="line.75"></a> |
| <span class="sourceLineNo">076</span> public StateMachine(State[] states, String startStateId) {<a name="line.76"></a> |
| <span class="sourceLineNo">077</span> this.states = new HashMap<String, State>();<a name="line.77"></a> |
| <span class="sourceLineNo">078</span> for (State s : states) {<a name="line.78"></a> |
| <span class="sourceLineNo">079</span> this.states.put(s.getId(), s);<a name="line.79"></a> |
| <span class="sourceLineNo">080</span> }<a name="line.80"></a> |
| <span class="sourceLineNo">081</span> this.startState = getState(startStateId);<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> /**<a name="line.84"></a> |
| <span class="sourceLineNo">085</span> * Creates a new instance using the specified {@link State}s and start<a name="line.85"></a> |
| <span class="sourceLineNo">086</span> * state.<a name="line.86"></a> |
| <span class="sourceLineNo">087</span> * <a name="line.87"></a> |
| <span class="sourceLineNo">088</span> * @param states the {@link State}s.<a name="line.88"></a> |
| <span class="sourceLineNo">089</span> * @param startStateId the id of the start {@link State}.<a name="line.89"></a> |
| <span class="sourceLineNo">090</span> */<a name="line.90"></a> |
| <span class="sourceLineNo">091</span> public StateMachine(Collection<State> states, String startStateId) {<a name="line.91"></a> |
| <span class="sourceLineNo">092</span> this(states.toArray(new State[0]), startStateId);<a name="line.92"></a> |
| <span class="sourceLineNo">093</span> }<a name="line.93"></a> |
| <span class="sourceLineNo">094</span><a name="line.94"></a> |
| <span class="sourceLineNo">095</span> /**<a name="line.95"></a> |
| <span class="sourceLineNo">096</span> * Returns the {@link State} with the specified id.<a name="line.96"></a> |
| <span class="sourceLineNo">097</span> * <a name="line.97"></a> |
| <span class="sourceLineNo">098</span> * @param id the id of the {@link State} to return.<a name="line.98"></a> |
| <span class="sourceLineNo">099</span> * @return the {@link State}<a name="line.99"></a> |
| <span class="sourceLineNo">100</span> * @throws NoSuchStateException if no matching {@link State} could be found.<a name="line.100"></a> |
| <span class="sourceLineNo">101</span> */<a name="line.101"></a> |
| <span class="sourceLineNo">102</span> public State getState(String id) throws NoSuchStateException {<a name="line.102"></a> |
| <span class="sourceLineNo">103</span> State state = states.get(id);<a name="line.103"></a> |
| <span class="sourceLineNo">104</span> if (state == null) {<a name="line.104"></a> |
| <span class="sourceLineNo">105</span> throw new NoSuchStateException(id);<a name="line.105"></a> |
| <span class="sourceLineNo">106</span> }<a name="line.106"></a> |
| <span class="sourceLineNo">107</span> return state;<a name="line.107"></a> |
| <span class="sourceLineNo">108</span> }<a name="line.108"></a> |
| <span class="sourceLineNo">109</span><a name="line.109"></a> |
| <span class="sourceLineNo">110</span> /**<a name="line.110"></a> |
| <span class="sourceLineNo">111</span> * @return an unmodifiable {@link Collection} of all {@link State}s used by<a name="line.111"></a> |
| <span class="sourceLineNo">112</span> * this {@link StateMachine}.<a name="line.112"></a> |
| <span class="sourceLineNo">113</span> */<a name="line.113"></a> |
| <span class="sourceLineNo">114</span> public Collection<State> getStates() {<a name="line.114"></a> |
| <span class="sourceLineNo">115</span> return Collections.unmodifiableCollection(states.values());<a name="line.115"></a> |
| <span class="sourceLineNo">116</span> }<a name="line.116"></a> |
| <span class="sourceLineNo">117</span><a name="line.117"></a> |
| <span class="sourceLineNo">118</span> /**<a name="line.118"></a> |
| <span class="sourceLineNo">119</span> * Processes the specified {@link Event} through this {@link StateMachine}.<a name="line.119"></a> |
| <span class="sourceLineNo">120</span> * Normally you wouldn't call this directly but rather use<a name="line.120"></a> |
| <span class="sourceLineNo">121</span> * {@link StateMachineProxyBuilder} to create a proxy for an interface of<a name="line.121"></a> |
| <span class="sourceLineNo">122</span> * your choice. Any method calls on the proxy will be translated into<a name="line.122"></a> |
| <span class="sourceLineNo">123</span> * {@link Event} objects and then fed to the {@link StateMachine} by the<a name="line.123"></a> |
| <span class="sourceLineNo">124</span> * proxy using this method.<a name="line.124"></a> |
| <span class="sourceLineNo">125</span> * <a name="line.125"></a> |
| <span class="sourceLineNo">126</span> * @param event the {@link Event} to be handled.<a name="line.126"></a> |
| <span class="sourceLineNo">127</span> */<a name="line.127"></a> |
| <span class="sourceLineNo">128</span> public void handle(Event event) {<a name="line.128"></a> |
| <span class="sourceLineNo">129</span> StateContext context = event.getContext();<a name="line.129"></a> |
| <span class="sourceLineNo">130</span><a name="line.130"></a> |
| <span class="sourceLineNo">131</span> synchronized (context) {<a name="line.131"></a> |
| <span class="sourceLineNo">132</span> LinkedList<Event> eventQueue = eventQueueThreadLocal.get();<a name="line.132"></a> |
| <span class="sourceLineNo">133</span> eventQueue.addLast(event);<a name="line.133"></a> |
| <span class="sourceLineNo">134</span><a name="line.134"></a> |
| <span class="sourceLineNo">135</span> if (processingThreadLocal.get()) {<a name="line.135"></a> |
| <span class="sourceLineNo">136</span> /*<a name="line.136"></a> |
| <span class="sourceLineNo">137</span> * This thread is already processing an event. Queue this <a name="line.137"></a> |
| <span class="sourceLineNo">138</span> * event.<a name="line.138"></a> |
| <span class="sourceLineNo">139</span> */<a name="line.139"></a> |
| <span class="sourceLineNo">140</span> if (LOGGER.isDebugEnabled()) {<a name="line.140"></a> |
| <span class="sourceLineNo">141</span> LOGGER.debug("State machine called recursively. Queuing event " + event + " for later processing.");<a name="line.141"></a> |
| <span class="sourceLineNo">142</span> }<a name="line.142"></a> |
| <span class="sourceLineNo">143</span> } else {<a name="line.143"></a> |
| <span class="sourceLineNo">144</span> processingThreadLocal.set(true);<a name="line.144"></a> |
| <span class="sourceLineNo">145</span> try {<a name="line.145"></a> |
| <span class="sourceLineNo">146</span> if (context.getCurrentState() == null) {<a name="line.146"></a> |
| <span class="sourceLineNo">147</span> context.setCurrentState(startState);<a name="line.147"></a> |
| <span class="sourceLineNo">148</span> }<a name="line.148"></a> |
| <span class="sourceLineNo">149</span> processEvents(eventQueue);<a name="line.149"></a> |
| <span class="sourceLineNo">150</span> } finally {<a name="line.150"></a> |
| <span class="sourceLineNo">151</span> processingThreadLocal.set(false);<a name="line.151"></a> |
| <span class="sourceLineNo">152</span> }<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><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> private void processEvents(LinkedList<Event> eventQueue) {<a name="line.158"></a> |
| <span class="sourceLineNo">159</span> while (!eventQueue.isEmpty()) {<a name="line.159"></a> |
| <span class="sourceLineNo">160</span> Event event = eventQueue.removeFirst();<a name="line.160"></a> |
| <span class="sourceLineNo">161</span> StateContext context = event.getContext();<a name="line.161"></a> |
| <span class="sourceLineNo">162</span> handle(context.getCurrentState(), event);<a name="line.162"></a> |
| <span class="sourceLineNo">163</span> }<a name="line.163"></a> |
| <span class="sourceLineNo">164</span> }<a name="line.164"></a> |
| <span class="sourceLineNo">165</span><a name="line.165"></a> |
| <span class="sourceLineNo">166</span> private void handle(State state, Event event) {<a name="line.166"></a> |
| <span class="sourceLineNo">167</span> StateContext context = event.getContext();<a name="line.167"></a> |
| <span class="sourceLineNo">168</span><a name="line.168"></a> |
| <span class="sourceLineNo">169</span> for (Transition t : state.getTransitions()) {<a name="line.169"></a> |
| <span class="sourceLineNo">170</span> if (LOGGER.isDebugEnabled()) {<a name="line.170"></a> |
| <span class="sourceLineNo">171</span> LOGGER.debug("Trying transition " + t);<a name="line.171"></a> |
| <span class="sourceLineNo">172</span> }<a name="line.172"></a> |
| <span class="sourceLineNo">173</span><a name="line.173"></a> |
| <span class="sourceLineNo">174</span> try {<a name="line.174"></a> |
| <span class="sourceLineNo">175</span> if (t.execute(event)) {<a name="line.175"></a> |
| <span class="sourceLineNo">176</span> if (LOGGER.isDebugEnabled()) {<a name="line.176"></a> |
| <span class="sourceLineNo">177</span> LOGGER.debug("Transition " + t + " executed successfully.");<a name="line.177"></a> |
| <span class="sourceLineNo">178</span> }<a name="line.178"></a> |
| <span class="sourceLineNo">179</span> setCurrentState(context, t.getNextState());<a name="line.179"></a> |
| <span class="sourceLineNo">180</span><a name="line.180"></a> |
| <span class="sourceLineNo">181</span> return;<a name="line.181"></a> |
| <span class="sourceLineNo">182</span> }<a name="line.182"></a> |
| <span class="sourceLineNo">183</span> } catch (BreakAndContinueException bace) {<a name="line.183"></a> |
| <span class="sourceLineNo">184</span> if (LOGGER.isDebugEnabled()) {<a name="line.184"></a> |
| <span class="sourceLineNo">185</span> LOGGER.debug("BreakAndContinueException thrown in " + "transition " + t<a name="line.185"></a> |
| <span class="sourceLineNo">186</span> + ". Continuing with next transition.");<a name="line.186"></a> |
| <span class="sourceLineNo">187</span> }<a name="line.187"></a> |
| <span class="sourceLineNo">188</span> } catch (BreakAndGotoException bage) {<a name="line.188"></a> |
| <span class="sourceLineNo">189</span> State newState = getState(bage.getStateId());<a name="line.189"></a> |
| <span class="sourceLineNo">190</span><a name="line.190"></a> |
| <span class="sourceLineNo">191</span> if (bage.isNow()) {<a name="line.191"></a> |
| <span class="sourceLineNo">192</span> if (LOGGER.isDebugEnabled()) {<a name="line.192"></a> |
| <span class="sourceLineNo">193</span> LOGGER.debug("BreakAndGotoException thrown in " + "transition " + t + ". Moving to state "<a name="line.193"></a> |
| <span class="sourceLineNo">194</span> + newState.getId() + " now.");<a name="line.194"></a> |
| <span class="sourceLineNo">195</span> }<a name="line.195"></a> |
| <span class="sourceLineNo">196</span> setCurrentState(context, newState);<a name="line.196"></a> |
| <span class="sourceLineNo">197</span> handle(newState, event);<a name="line.197"></a> |
| <span class="sourceLineNo">198</span> } else {<a name="line.198"></a> |
| <span class="sourceLineNo">199</span> if (LOGGER.isDebugEnabled()) {<a name="line.199"></a> |
| <span class="sourceLineNo">200</span> LOGGER.debug("BreakAndGotoException thrown in " + "transition " + t + ". Moving to state "<a name="line.200"></a> |
| <span class="sourceLineNo">201</span> + newState.getId() + " next.");<a name="line.201"></a> |
| <span class="sourceLineNo">202</span> }<a name="line.202"></a> |
| <span class="sourceLineNo">203</span> setCurrentState(context, newState);<a name="line.203"></a> |
| <span class="sourceLineNo">204</span> }<a name="line.204"></a> |
| <span class="sourceLineNo">205</span> return;<a name="line.205"></a> |
| <span class="sourceLineNo">206</span> } catch (BreakAndCallException bace) {<a name="line.206"></a> |
| <span class="sourceLineNo">207</span> State newState = getState(bace.getStateId());<a name="line.207"></a> |
| <span class="sourceLineNo">208</span><a name="line.208"></a> |
| <span class="sourceLineNo">209</span> Stack<State> callStack = getCallStack(context);<a name="line.209"></a> |
| <span class="sourceLineNo">210</span> State returnTo = bace.getReturnToStateId() != null ? getState(bace.getReturnToStateId()) : context<a name="line.210"></a> |
| <span class="sourceLineNo">211</span> .getCurrentState();<a name="line.211"></a> |
| <span class="sourceLineNo">212</span> callStack.push(returnTo);<a name="line.212"></a> |
| <span class="sourceLineNo">213</span><a name="line.213"></a> |
| <span class="sourceLineNo">214</span> if (bace.isNow()) {<a name="line.214"></a> |
| <span class="sourceLineNo">215</span> if (LOGGER.isDebugEnabled()) {<a name="line.215"></a> |
| <span class="sourceLineNo">216</span> LOGGER.debug("BreakAndCallException thrown in " + "transition " + t + ". Moving to state "<a name="line.216"></a> |
| <span class="sourceLineNo">217</span> + newState.getId() + " now.");<a name="line.217"></a> |
| <span class="sourceLineNo">218</span> }<a name="line.218"></a> |
| <span class="sourceLineNo">219</span> setCurrentState(context, newState);<a name="line.219"></a> |
| <span class="sourceLineNo">220</span> handle(newState, event);<a name="line.220"></a> |
| <span class="sourceLineNo">221</span> } else {<a name="line.221"></a> |
| <span class="sourceLineNo">222</span> if (LOGGER.isDebugEnabled()) {<a name="line.222"></a> |
| <span class="sourceLineNo">223</span> LOGGER.debug("BreakAndCallException thrown in " + "transition " + t + ". Moving to state "<a name="line.223"></a> |
| <span class="sourceLineNo">224</span> + newState.getId() + " next.");<a name="line.224"></a> |
| <span class="sourceLineNo">225</span> }<a name="line.225"></a> |
| <span class="sourceLineNo">226</span> setCurrentState(context, newState);<a name="line.226"></a> |
| <span class="sourceLineNo">227</span> }<a name="line.227"></a> |
| <span class="sourceLineNo">228</span> return;<a name="line.228"></a> |
| <span class="sourceLineNo">229</span> } catch (BreakAndReturnException bare) {<a name="line.229"></a> |
| <span class="sourceLineNo">230</span> Stack<State> callStack = getCallStack(context);<a name="line.230"></a> |
| <span class="sourceLineNo">231</span> State newState = callStack.pop();<a name="line.231"></a> |
| <span class="sourceLineNo">232</span><a name="line.232"></a> |
| <span class="sourceLineNo">233</span> if (bare.isNow()) {<a name="line.233"></a> |
| <span class="sourceLineNo">234</span> if (LOGGER.isDebugEnabled()) {<a name="line.234"></a> |
| <span class="sourceLineNo">235</span> LOGGER.debug("BreakAndReturnException thrown in " + "transition " + t + ". Moving to state "<a name="line.235"></a> |
| <span class="sourceLineNo">236</span> + newState.getId() + " now.");<a name="line.236"></a> |
| <span class="sourceLineNo">237</span> }<a name="line.237"></a> |
| <span class="sourceLineNo">238</span> setCurrentState(context, newState);<a name="line.238"></a> |
| <span class="sourceLineNo">239</span> handle(newState, event);<a name="line.239"></a> |
| <span class="sourceLineNo">240</span> } else {<a name="line.240"></a> |
| <span class="sourceLineNo">241</span> if (LOGGER.isDebugEnabled()) {<a name="line.241"></a> |
| <span class="sourceLineNo">242</span> LOGGER.debug("BreakAndReturnException thrown in " + "transition " + t + ". Moving to state "<a name="line.242"></a> |
| <span class="sourceLineNo">243</span> + newState.getId() + " next.");<a name="line.243"></a> |
| <span class="sourceLineNo">244</span> }<a name="line.244"></a> |
| <span class="sourceLineNo">245</span> setCurrentState(context, newState);<a name="line.245"></a> |
| <span class="sourceLineNo">246</span> }<a name="line.246"></a> |
| <span class="sourceLineNo">247</span> return;<a name="line.247"></a> |
| <span class="sourceLineNo">248</span> }<a name="line.248"></a> |
| <span class="sourceLineNo">249</span> }<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> * No transition could handle the event. Try with the parent state if<a name="line.252"></a> |
| <span class="sourceLineNo">253</span> * there is one.<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> if (state.getParent() != null) {<a name="line.256"></a> |
| <span class="sourceLineNo">257</span> handle(state.getParent(), event);<a name="line.257"></a> |
| <span class="sourceLineNo">258</span> } else {<a name="line.258"></a> |
| <span class="sourceLineNo">259</span> throw new UnhandledEventException(event);<a name="line.259"></a> |
| <span class="sourceLineNo">260</span> }<a name="line.260"></a> |
| <span class="sourceLineNo">261</span> }<a name="line.261"></a> |
| <span class="sourceLineNo">262</span><a name="line.262"></a> |
| <span class="sourceLineNo">263</span> private Stack<State> getCallStack(StateContext context) {<a name="line.263"></a> |
| <span class="sourceLineNo">264</span> @SuppressWarnings("unchecked")<a name="line.264"></a> |
| <span class="sourceLineNo">265</span> Stack<State> callStack = (Stack<State>) context.getAttribute(CALL_STACK);<a name="line.265"></a> |
| <span class="sourceLineNo">266</span> if (callStack == null) {<a name="line.266"></a> |
| <span class="sourceLineNo">267</span> callStack = new Stack<State>();<a name="line.267"></a> |
| <span class="sourceLineNo">268</span> context.setAttribute(CALL_STACK, callStack);<a name="line.268"></a> |
| <span class="sourceLineNo">269</span> }<a name="line.269"></a> |
| <span class="sourceLineNo">270</span> return callStack;<a name="line.270"></a> |
| <span class="sourceLineNo">271</span> }<a name="line.271"></a> |
| <span class="sourceLineNo">272</span><a name="line.272"></a> |
| <span class="sourceLineNo">273</span> private void setCurrentState(StateContext context, State newState) {<a name="line.273"></a> |
| <span class="sourceLineNo">274</span> if (newState != null) {<a name="line.274"></a> |
| <span class="sourceLineNo">275</span> if (LOGGER.isDebugEnabled()) {<a name="line.275"></a> |
| <span class="sourceLineNo">276</span> if (newState != context.getCurrentState()) {<a name="line.276"></a> |
| <span class="sourceLineNo">277</span> LOGGER.debug("Leaving state " + context.getCurrentState().getId());<a name="line.277"></a> |
| <span class="sourceLineNo">278</span> LOGGER.debug("Entering state " + newState.getId());<a name="line.278"></a> |
| <span class="sourceLineNo">279</span> }<a name="line.279"></a> |
| <span class="sourceLineNo">280</span> }<a name="line.280"></a> |
| <span class="sourceLineNo">281</span> executeOnExits(context, context.getCurrentState());<a name="line.281"></a> |
| <span class="sourceLineNo">282</span> executeOnEntries(context, newState);<a name="line.282"></a> |
| <span class="sourceLineNo">283</span> context.setCurrentState(newState);<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><a name="line.286"></a> |
| <span class="sourceLineNo">287</span> void executeOnExits(StateContext context, State state) {<a name="line.287"></a> |
| <span class="sourceLineNo">288</span> List<SelfTransition> onExits = state.getOnExitSelfTransitions();<a name="line.288"></a> |
| <span class="sourceLineNo">289</span> boolean isExecuted = false;<a name="line.289"></a> |
| <span class="sourceLineNo">290</span><a name="line.290"></a> |
| <span class="sourceLineNo">291</span> if (onExits != null)<a name="line.291"></a> |
| <span class="sourceLineNo">292</span> for (SelfTransition selfTransition : onExits) {<a name="line.292"></a> |
| <span class="sourceLineNo">293</span> selfTransition.execute(context, state);<a name="line.293"></a> |
| <span class="sourceLineNo">294</span> if (LOGGER.isDebugEnabled()) {<a name="line.294"></a> |
| <span class="sourceLineNo">295</span> isExecuted = true;<a name="line.295"></a> |
| <span class="sourceLineNo">296</span> LOGGER.debug("Executing onEntry action for " + state.getId());<a name="line.296"></a> |
| <span class="sourceLineNo">297</span> }<a name="line.297"></a> |
| <span class="sourceLineNo">298</span> }<a name="line.298"></a> |
| <span class="sourceLineNo">299</span> if (LOGGER.isDebugEnabled() && !isExecuted) {<a name="line.299"></a> |
| <span class="sourceLineNo">300</span> LOGGER.debug("No onEntry action for " + state.getId());<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> }<a name="line.303"></a> |
| <span class="sourceLineNo">304</span><a name="line.304"></a> |
| <span class="sourceLineNo">305</span> void executeOnEntries(StateContext context, State state) {<a name="line.305"></a> |
| <span class="sourceLineNo">306</span> List<SelfTransition> onEntries = state.getOnEntrySelfTransitions();<a name="line.306"></a> |
| <span class="sourceLineNo">307</span> boolean isExecuted = false;<a name="line.307"></a> |
| <span class="sourceLineNo">308</span><a name="line.308"></a> |
| <span class="sourceLineNo">309</span> if (onEntries != null)<a name="line.309"></a> |
| <span class="sourceLineNo">310</span> for (SelfTransition selfTransition : onEntries) {<a name="line.310"></a> |
| <span class="sourceLineNo">311</span> selfTransition.execute(context, state);<a name="line.311"></a> |
| <span class="sourceLineNo">312</span> if (LOGGER.isDebugEnabled()) {<a name="line.312"></a> |
| <span class="sourceLineNo">313</span> isExecuted = true;<a name="line.313"></a> |
| <span class="sourceLineNo">314</span> LOGGER.debug("Executing onExit action for " + state.getId());<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> if (LOGGER.isDebugEnabled() && !isExecuted) {<a name="line.317"></a> |
| <span class="sourceLineNo">318</span> LOGGER.debug("No onEntry action for " + state.getId());<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">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>}<a name="line.324"></a> |
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| </pre> |
| </div> |
| </body> |
| </html> |
