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78 lines
3.2 KiB
78 lines
3.2 KiB
20 years ago
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package de.anomic.server;
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import java.lang.reflect.*;
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public class serverInstantThread extends serverAbstractThread implements serverThread {
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private Method jobExecMethod, jobCountMethod;
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private Object environment;
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public serverInstantThread(Object env, String jobExec, String jobCount) {
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// job is the name of a method of the object 'env'
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try {
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this.jobExecMethod = env.getClass().getMethod(jobExec, new Class[0]);
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if (jobCount == null)
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this.jobCountMethod = null;
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else
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this.jobCountMethod = env.getClass().getMethod(jobCount, new Class[0]);
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this.environment = env;
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this.setName(env.getClass().getName() + "." + jobExec);
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} catch (NoSuchMethodException e) {
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throw new RuntimeException("Internal Error in serverInstantThread, wrong declaration: " + e.getMessage());
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}
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}
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public int getJobCount() {
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if (this.jobCountMethod == null) return Integer.MAX_VALUE;
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try {
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Object result = jobCountMethod.invoke(environment, new Object[0]);
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if (result instanceof Integer)
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return ((Integer) result).intValue();
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else
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return -1;
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} catch (IllegalAccessException e) {
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return -1;
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} catch (IllegalArgumentException e) {
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return -1;
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} catch (InvocationTargetException e) {
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System.out.println("Runtime Error in serverInstantThread, thread '" + this.getName() + "': " + e.getMessage());
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e.printStackTrace();
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return -1;
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}
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}
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public boolean job() throws Exception {
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boolean jobHasDoneSomething = false;
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try {
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Object result = jobExecMethod.invoke(environment, new Object[0]);
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if (result == null) jobHasDoneSomething = true;
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else if (result instanceof Boolean) jobHasDoneSomething = ((Boolean) result).booleanValue();
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} catch (IllegalAccessException e) {
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System.out.println("Internal Error in serverInstantThread: " + e.getMessage());
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System.out.println("shutting down thread '" + this.getName() + "'");
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this.terminate(false);
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} catch (IllegalArgumentException e) {
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System.out.println("Internal Error in serverInstantThread: " + e.getMessage());
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System.out.println("shutting down thread '" + this.getName() + "'");
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this.terminate(false);
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} catch (InvocationTargetException e) {
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System.out.println("Runtime Error in serverInstantThread, thread '" + this.getName() + "': " + e.getMessage());
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e.printStackTrace();
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}
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return jobHasDoneSomething;
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}
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public static serverThread oneTimeJob(Object env, String jobExec, serverLog log, long startupDelay) {
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// start the job and execute it once as background process
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serverThread thread = new serverInstantThread(env, jobExec, null);
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thread.setStartupSleep(startupDelay);
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thread.setIdleSleep(-1);
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thread.setBusySleep(-1);
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thread.setLog(log);
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thread.start();
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return thread;
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}
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}
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