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package org.mule.module.scripting.component; |
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import org.mule.DefaultMuleEventContext; |
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import org.mule.DefaultMuleMessage; |
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import org.mule.api.MuleContext; |
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import org.mule.api.MuleEvent; |
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import org.mule.api.MuleMessage; |
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import org.mule.api.context.MuleContextAware; |
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import org.mule.api.lifecycle.Initialisable; |
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import org.mule.api.lifecycle.InitialisationException; |
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import org.mule.api.service.Service; |
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import org.mule.config.i18n.CoreMessages; |
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import org.mule.config.i18n.MessageFactory; |
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import org.mule.transport.NullPayload; |
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import org.mule.util.CollectionUtils; |
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import org.mule.util.IOUtils; |
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import org.mule.util.StringUtils; |
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import java.io.IOException; |
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import java.io.InputStream; |
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import java.io.InputStreamReader; |
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import java.io.Reader; |
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import java.io.StringReader; |
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import java.util.Map; |
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import java.util.Properties; |
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import javax.script.Bindings; |
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import javax.script.Compilable; |
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import javax.script.CompiledScript; |
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import javax.script.ScriptEngine; |
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import javax.script.ScriptEngineManager; |
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import javax.script.ScriptException; |
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import org.apache.commons.logging.Log; |
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import org.apache.commons.logging.LogFactory; |
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public class Scriptable implements Initialisable, MuleContextAware |
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{ |
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private String scriptText; |
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private String scriptFile; |
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private Properties properties; |
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private String scriptEngineName; |
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private CompiledScript compiledScript; |
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private ScriptEngine scriptEngine; |
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private ScriptEngineManager scriptEngineManager; |
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private MuleContext muleContext; |
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|
73 | 0 | protected transient Log logger = LogFactory.getLog(getClass()); |
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public Scriptable() |
76 | 0 | { |
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|
78 | 0 | } |
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public Scriptable(MuleContext muleContext) |
81 | 0 | { |
82 | 0 | this.muleContext = muleContext; |
83 | 0 | } |
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public void setMuleContext(MuleContext context) |
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{ |
87 | 0 | this.muleContext = context; |
88 | 0 | } |
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public void initialise() throws InitialisationException |
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{ |
92 | 0 | scriptEngineManager = new ScriptEngineManager(); |
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|
95 | 0 | if (scriptEngineName != null) |
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{ |
97 | 0 | scriptEngine = createScriptEngineByName(scriptEngineName); |
98 | 0 | if (scriptEngine == null) |
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{ |
100 | 0 | throw new InitialisationException(MessageFactory.createStaticMessage("Scripting engine '" + scriptEngineName + "' not found. Available engines are: " + listAvailableEngines()), this); |
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} |
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} |
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|
104 | 0 | else if (scriptFile != null) |
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{ |
106 | 0 | int i = scriptFile.lastIndexOf("."); |
107 | 0 | if (i > -1) |
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{ |
109 | 0 | logger.info("Script Engine name not set. Guessing by file extension."); |
110 | 0 | String ext = scriptFile.substring(i + 1); |
111 | 0 | scriptEngine = createScriptEngineByExtension(ext); |
112 | 0 | if (scriptEngine == null) |
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{ |
114 | 0 | throw new InitialisationException(MessageFactory.createStaticMessage("File extension '" + ext + "' does not map to a scripting engine. Available engines are: " + listAvailableEngines()), this); |
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} |
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else |
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{ |
118 | 0 | setScriptEngineName(scriptEngine.getFactory().getEngineName()); |
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} |
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} |
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} |
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|
123 | 0 | Reader script = null; |
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try |
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{ |
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|
127 | 0 | if (StringUtils.isNotBlank(scriptText)) |
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{ |
129 | 0 | script = new StringReader(scriptText); |
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} |
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|
132 | 0 | else if (scriptFile != null) |
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{ |
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InputStream is; |
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try |
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{ |
137 | 0 | is = IOUtils.getResourceAsStream(scriptFile, getClass()); |
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} |
139 | 0 | catch (IOException e) |
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{ |
141 | 0 | throw new InitialisationException(CoreMessages.cannotLoadFromClasspath(scriptFile), e, this); |
142 | 0 | } |
143 | 0 | if (is == null) |
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{ |
145 | 0 | throw new InitialisationException(CoreMessages.cannotLoadFromClasspath(scriptFile), this); |
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} |
147 | 0 | script = new InputStreamReader(is); |
148 | 0 | } |
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else |
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{ |
151 | 0 | throw new InitialisationException(CoreMessages.propertiesNotSet("scriptText, scriptFile"), this); |
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} |
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|
155 | 0 | if (scriptEngine instanceof Compilable) |
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{ |
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try |
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{ |
159 | 0 | compiledScript = ((Compilable) scriptEngine).compile(script); |
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} |
161 | 0 | catch (ScriptException e) |
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{ |
163 | 0 | throw new InitialisationException(e, this); |
164 | 0 | } |
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} |
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} |
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finally |
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{ |
169 | 0 | if (script != null) |
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{ |
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try |
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{ |
173 | 0 | script.close(); |
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} |
175 | 0 | catch (IOException e) |
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{ |
177 | 0 | throw new InitialisationException(e, this); |
178 | 0 | } |
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} |
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} |
181 | 0 | } |
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|
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public void populateDefaultBindings(Bindings bindings) |
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{ |
185 | 0 | if (properties != null) |
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{ |
187 | 0 | bindings.putAll((Map) properties); |
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} |
189 | 0 | bindings.put("log", logger); |
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|
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|
192 | 0 | bindings.put("result", NullPayload.getInstance()); |
193 | 0 | bindings.put("muleContext", muleContext); |
194 | 0 | bindings.put("registry", muleContext.getRegistry()); |
195 | 0 | } |
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|
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public void populateBindings(Bindings bindings, Object payload) |
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{ |
199 | 0 | populateDefaultBindings(bindings); |
200 | 0 | bindings.put("payload", payload); |
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|
203 | 0 | bindings.put("src", payload); |
204 | 0 | } |
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public void populateBindings(Bindings bindings, MuleMessage message) |
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{ |
208 | 0 | populateDefaultBindings(bindings); |
209 | 0 | if (message == null) |
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{ |
211 | 0 | message = new DefaultMuleMessage(NullPayload.getInstance(), muleContext); |
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} |
213 | 0 | bindings.put("message", message); |
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|
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|
216 | 0 | bindings.put("payload", message.getPayload()); |
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|
218 | 0 | bindings.put("src", message.getPayload()); |
219 | 0 | } |
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public void populateBindings(Bindings bindings, MuleEvent event) |
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{ |
223 | 0 | populateBindings(bindings, event.getMessage()); |
224 | 0 | bindings.put("originalPayload", event.getMessage().getPayload()); |
225 | 0 | bindings.put("payload", event.getMessage().getPayload()); |
226 | 0 | bindings.put("eventContext", new DefaultMuleEventContext(event)); |
227 | 0 | bindings.put("id", event.getId()); |
228 | 0 | bindings.put("flowConstruct", event.getFlowConstruct()); |
229 | 0 | if (event.getFlowConstruct() instanceof Service) |
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{ |
231 | 0 | bindings.put("service", event.getFlowConstruct()); |
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} |
233 | 0 | } |
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public Object runScript(Bindings bindings) throws ScriptException |
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{ |
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Object result; |
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try |
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{ |
240 | 0 | if (compiledScript != null) |
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{ |
242 | 0 | result = compiledScript.eval(bindings); |
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} |
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else |
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{ |
246 | 0 | result = scriptEngine.eval(scriptText, bindings); |
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} |
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|
251 | 0 | if (result == null) |
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{ |
253 | 0 | result = bindings.get("result"); |
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} |
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} |
256 | 0 | catch (ScriptException e) |
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{ |
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|
259 | 0 | throw e; |
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} |
261 | 0 | catch (Exception ex) |
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{ |
263 | 0 | throw new ScriptException(ex); |
264 | 0 | } |
265 | 0 | return result; |
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} |
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protected ScriptEngine createScriptEngineByName(String name) |
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{ |
270 | 0 | return scriptEngineManager.getEngineByName(name); |
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} |
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protected ScriptEngine createScriptEngineByExtension(String ext) |
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{ |
275 | 0 | return scriptEngineManager.getEngineByExtension(ext); |
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} |
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|
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protected String listAvailableEngines() |
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{ |
280 | 0 | return CollectionUtils.toString(scriptEngineManager.getEngineFactories(), false); |
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} |
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public String getScriptText() |
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{ |
289 | 0 | return scriptText; |
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} |
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public void setScriptText(String scriptText) |
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{ |
294 | 0 | this.scriptText = scriptText; |
295 | 0 | } |
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public String getScriptFile() |
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{ |
299 | 0 | return scriptFile; |
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} |
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public void setScriptFile(String scriptFile) |
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{ |
304 | 0 | this.scriptFile = scriptFile; |
305 | 0 | } |
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public void setScriptEngineName(String scriptEngineName) |
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{ |
309 | 0 | this.scriptEngineName = scriptEngineName; |
310 | 0 | } |
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public String getScriptEngineName() |
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{ |
314 | 0 | return scriptEngineName; |
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} |
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public Properties getProperties() |
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{ |
319 | 0 | return properties; |
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} |
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public void setProperties(Properties properties) |
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{ |
324 | 0 | this.properties = properties; |
325 | 0 | } |
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|
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public ScriptEngine getScriptEngine() |
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{ |
329 | 0 | return scriptEngine; |
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} |
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protected void setScriptEngine(ScriptEngine scriptEngine) |
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{ |
334 | 0 | this.scriptEngine = scriptEngine; |
335 | 0 | } |
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protected CompiledScript getCompiledScript() |
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{ |
339 | 0 | return compiledScript; |
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} |
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protected void setCompiledScript(CompiledScript compiledScript) |
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{ |
344 | 0 | this.compiledScript = compiledScript; |
345 | 0 | } |
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} |