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package org.mule.components.script; |
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import org.mule.impl.UMODescriptorAware; |
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import org.mule.umo.UMODescriptor; |
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import org.mule.umo.UMOException; |
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import org.mule.umo.lifecycle.Callable; |
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import org.mule.umo.lifecycle.Initialisable; |
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import org.mule.umo.lifecycle.InitialisationException; |
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import org.mule.umo.lifecycle.Lifecycle; |
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import org.mule.util.ClassUtils; |
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import org.mule.util.FileUtils; |
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import org.mule.util.monitor.FileListener; |
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import org.mule.util.monitor.FileMonitor; |
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|
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import java.io.File; |
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import java.net.MalformedURLException; |
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import java.net.URL; |
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import org.apache.commons.logging.Log; |
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import org.apache.commons.logging.LogFactory; |
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38 | 0 | public abstract class AbstractScriptComponent |
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implements Initialisable, Lifecycle, UMODescriptorAware, FileListener, Callable |
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{ |
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public static final int DEFAULT_RELOAD_INTERVAL_MS = 60000; |
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|
46 | 0 | protected transient Log logger = LogFactory.getLog(getClass()); |
47 | 0 | private String script = null; |
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|
49 | 0 | private String scriptText = null; |
50 | 0 | private boolean autoReload = true; |
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protected UMODescriptor descriptor; |
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private FileMonitor monitor; |
53 | 0 | private long reloadInterval = DEFAULT_RELOAD_INTERVAL_MS; |
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|
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public void setDescriptor(UMODescriptor descriptor) |
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{ |
57 | 0 | this.descriptor = descriptor; |
58 | 0 | } |
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|
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public void initialise() throws InitialisationException |
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{ |
62 | 0 | if (getScript() == null && getScriptText() == null) |
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{ |
64 | 0 | String extension = getDefaultFileExtension(); |
65 | 0 | if (!extension.startsWith(".")) |
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{ |
67 | 0 | extension = "." + extension; |
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} |
69 | 0 | setScript(descriptor.getName() + extension); |
70 | 0 | logger.info("script name is not set, using default: " + descriptor.getName() + extension); |
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} |
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|
73 | 0 | if (getScriptText() != null) |
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{ |
75 | 0 | loadInterpreter(getScriptText()); |
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} |
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else |
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{ |
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|
81 | 0 | loadInterpreter(getScriptUrl(getScript())); |
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} |
83 | 0 | if (autoReload) |
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{ |
85 | 0 | File f = FileUtils.newFile(getScript()); |
86 | 0 | if (f.exists()) |
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{ |
88 | 0 | monitor = new FileMonitor(reloadInterval); |
89 | 0 | monitor.addFile(f); |
90 | 0 | monitor.addListener(this); |
91 | 0 | logger.debug("Component script is reloadable"); |
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} |
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else |
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{ |
95 | 0 | logger.warn("Cannot setup autoreload as the script fie is not on the local file system"); |
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} |
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} |
98 | 0 | } |
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|
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protected URL getScriptUrl(String scriptLocation) |
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{ |
102 | 0 | File f = FileUtils.newFile(scriptLocation); |
103 | 0 | if (f.exists()) |
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{ |
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try |
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{ |
107 | 0 | return f.toURL(); |
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} |
109 | 0 | catch (MalformedURLException e) |
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{ |
111 | 0 | logger.error("Failed to create URL from file: " + f.getAbsolutePath(), e); |
112 | 0 | return null; |
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} |
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} |
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else |
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{ |
117 | 0 | return ClassUtils.getResource(scriptLocation, getClass()); |
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} |
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} |
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public String getScript() |
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{ |
123 | 0 | return script; |
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} |
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public void setScript(String script) |
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{ |
128 | 0 | this.script = script; |
129 | 0 | } |
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|
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public boolean isAutoReload() |
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{ |
133 | 0 | return autoReload; |
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} |
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|
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public void setAutoReload(boolean autoReload) |
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{ |
138 | 0 | this.autoReload = autoReload; |
139 | 0 | } |
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public void start() throws UMOException |
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{ |
143 | 0 | if (monitor != null) |
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{ |
145 | 0 | monitor.start(); |
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} |
147 | 0 | } |
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public void stop() throws UMOException |
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{ |
151 | 0 | if (monitor != null) |
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{ |
153 | 0 | monitor.stop(); |
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} |
155 | 0 | } |
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public void dispose() |
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{ |
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try |
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{ |
161 | 0 | stop(); |
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} |
163 | 0 | catch (UMOException e) |
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{ |
165 | 0 | logger.error(e.getMessage(), e); |
166 | 0 | } |
167 | 0 | } |
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|
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public String getScriptText() |
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{ |
171 | 0 | return scriptText; |
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} |
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public void setScriptText(String scriptText) |
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{ |
176 | 0 | this.scriptText = scriptText; |
177 | 0 | } |
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protected abstract void loadInterpreter(URL script) throws InitialisationException; |
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protected abstract void loadInterpreter(String scriptText) throws InitialisationException; |
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|
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protected abstract String getDefaultFileExtension(); |
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} |