stdschedulerfactory.java

定时器开源项目, 相对于 jcrontab, Quartz 算是更完整的一个项目, 随著开发的版本上来, 他已经脱离只是写在程序里面的计时器, 在指定的时间或区间, 处理所指定的事件. 也加入了 se

                    + jobListenerNames[i], true);
            
            String listenerClass = lp.getProperty(PROP_LISTENER_CLASS, null);

            if (listenerClass == null) {
                initException = new SchedulerException(
                        "JobListener class not specified for listener '"
                                + jobListenerNames[i] + "'",
                        SchedulerException.ERR_BAD_CONFIGURATION);
                throw initException;
            }
            JobListener listener = null;
            try {
               listener = (JobListener) loadClass(listenerClass).newInstance();
            } catch (Exception e) {
                initException = new SchedulerException(
                        "JobListener class '" + listenerClass
                                + "' could not be instantiated.", e);
                initException
                        .setErrorCode(SchedulerException.ERR_BAD_CONFIGURATION);
                throw initException;
            }
            try {
                Method nameSetter = listener.getClass().getMethod("setName", strArg);
                if(nameSetter != null)
                    nameSetter.invoke(listener, new Object[] {jobListenerNames[i] } );
                setBeanProps(listener, lp);
            } catch (Exception e) {
                initException = new SchedulerException(
                        "JobListener '" + listenerClass
                                + "' props could not be configured.", e);
                initException
                        .setErrorCode(SchedulerException.ERR_BAD_CONFIGURATION);
                throw initException;
            }
            jobListeners[i] = listener;
        }
               
        // Set up any TriggerListeners
        // ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

        String[] triggerListenerNames = cfg.getPropertyGroups(PROP_TRIGGER_LISTENER_PREFIX);
        TriggerListener[] triggerListeners = new TriggerListener[triggerListenerNames.length];
        for (int i = 0; i < triggerListenerNames.length; i++) {
            Properties lp = cfg.getPropertyGroup(PROP_TRIGGER_LISTENER_PREFIX + "."
                    + triggerListenerNames[i], true);
            
            String listenerClass = lp.getProperty(PROP_LISTENER_CLASS, null);

            if (listenerClass == null) {
                initException = new SchedulerException(
                        "TriggerListener class not specified for listener '"
                                + triggerListenerNames[i] + "'",
                        SchedulerException.ERR_BAD_CONFIGURATION);
                throw initException;
            }
            TriggerListener listener = null;
            try {
               listener = (TriggerListener) loadClass(listenerClass).newInstance();
            } catch (Exception e) {
                initException = new SchedulerException(
                        "TriggerListener class '" + listenerClass
                                + "' could not be instantiated.", e);
                initException
                        .setErrorCode(SchedulerException.ERR_BAD_CONFIGURATION);
                throw initException;
            }
            try {
                Method nameSetter = listener.getClass().getMethod("setName", strArg);
                if(nameSetter != null)
                    nameSetter.invoke(listener, new Object[] {triggerListenerNames[i] } );
                setBeanProps(listener, lp);
            } catch (Exception e) {
                initException = new SchedulerException(
                        "TriggerListener '" + listenerClass
                                + "' props could not be configured.", e);
                initException
                        .setErrorCode(SchedulerException.ERR_BAD_CONFIGURATION);
                throw initException;
            }
            triggerListeners[i] = listener;
        }
                
        
        // Fire everything up
        // ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

        JobRunShellFactory jrsf = null; // Create correct run-shell factory...
        UserTransactionHelper userTxHelper = null;

        if (wrapJobInTx)
                userTxHelper = new UserTransactionHelper(userTXLocation);

        if (wrapJobInTx) jrsf = new JTAJobRunShellFactory(userTxHelper);
        else
            jrsf = new StdJobRunShellFactory();

        if (autoId) {
            try {
                schedInstId = DEFAULT_INSTANCE_ID;
                if (js instanceof org.quartz.impl.jdbcjobstore.JobStoreSupport) {
                    if(((org.quartz.impl.jdbcjobstore.JobStoreSupport) js) 
                        .isClustered()) {
                        schedInstId = InetAddress.getLocalHost().getHostName()
                            + System.currentTimeMillis();
                    }
                }
            } catch (Exception e) {
                getLog().error("Couldn't get host name!", e);
                throw new IllegalStateException(
                        "Cannot run without an instance id.");
            }
        }

        if (js instanceof JobStoreSupport) {
            JobStoreSupport jjs = (JobStoreSupport) js;
            jjs.setInstanceId(schedInstId);
            jjs.setDbRetryInterval(dbFailureRetry);
        }
        
        QuartzSchedulerResources rsrcs = new QuartzSchedulerResources();
        rsrcs.setName(schedName);
        rsrcs.setThreadName(threadName);        
        rsrcs.setInstanceId(schedInstId);
        rsrcs.setJobRunShellFactory(jrsf);

        if (rmiExport) {
            rsrcs.setRMIRegistryHost(rmiHost);
            rsrcs.setRMIRegistryPort(rmiPort);
            rsrcs.setRMICreateRegistryStrategy(rmiCreateRegistry);
        }

        rsrcs.setThreadPool(tp);
        if(tp instanceof SimpleThreadPool)
          ((SimpleThreadPool)tp).setThreadNamePrefix(schedName + "_Worker");
        tp.initialize();
        
        rsrcs.setJobStore(js);
        ClassLoadHelper loadHelper = null;
        try {
            loadHelper = (ClassLoadHelper) loadClass(classLoadHelperClass)
                    .newInstance();
        } catch (Exception e) {
            throw new SchedulerConfigException(
                    "Unable to instantiate class load helper class: "
                            + e.getMessage(), e);
        }
        loadHelper.initialize();

        schedCtxt = new SchedulingContext();
        schedCtxt.setInstanceId(rsrcs.getInstanceId());

        qs = new QuartzScheduler(rsrcs, schedCtxt, idleWaitTime, dbFailureRetry);

        //    if(usingJSCMT)
        //      qs.setSignalOnSchedulingChange(false); // TODO: fixed? (don't need
        // this any more?)

        schedCtxt = new SchedulingContext();
        schedCtxt.setInstanceId(rsrcs.getInstanceId());

        Scheduler scheduler = new StdScheduler(qs, schedCtxt);

        // add plugins
        for (int i = 0; i < plugins.length; i++) {
            plugins[i].initialize(pluginNames[i], scheduler);
            qs.addSchedulerPlugin(plugins[i]);
        }
        
        // add listeners
        for (int i = 0; i < jobListeners.length; i++) {
            qs.addGlobalJobListener(jobListeners[i]);
        }
        for (int i = 0; i < triggerListeners.length; i++) {
            qs.addGlobalTriggerListener(triggerListeners[i]);
        }
        
        // set scheduler context data...
        Iterator itr = schedCtxtProps.keySet().iterator();
        while(itr.hasNext()) {
            String key = (String) itr.next();
            String val = schedCtxtProps.getProperty(key);
            
            scheduler.getContext().put(key, val);
        }
        
        // fire up job store, and runshell factory

        js.initialize(loadHelper, qs.getSchedulerSignaler());

        jrsf.initialize(scheduler, schedCtxt);

        getLog().info(
                "Quartz scheduler '" + scheduler.getSchedulerName()
                        + "' initialized from " + propSrc);

        getLog().info("Quartz scheduler version: " + qs.getVersion());

        // prevents the repository from being garbage collected
        qs.addNoGCObject(schedRep);
        // prevents the db manager from being garbage collected
        if (dbMgr != null) qs.addNoGCObject(dbMgr);

        schedRep.bind(scheduler);

        return scheduler;
    }
    private void setBeanProps(Object obj, Properties props)
            throws NoSuchMethodException, IllegalAccessException,
            java.lang.reflect.InvocationTargetException,
            IntrospectionException, SchedulerConfigException {
        props.remove("class");

        BeanInfo bi = Introspector.getBeanInfo(obj.getClass());
        PropertyDescriptor[] propDescs = bi.getPropertyDescriptors();
        PropertiesParser pp = new PropertiesParser(props);

        java.util.Enumeration keys = props.keys();
        while (keys.hasMoreElements()) {
            String name = (String) keys.nextElement();
            String c = name.substring(0, 1).toUpperCase();
            String methName = "set" + c + name.substring(1);

            java.lang.reflect.Method setMeth = getSetMethod(methName, propDescs);

            try {
                if (setMeth == null)
                        throw new NoSuchMethodException(
                                "No setter for property '" + name + "'");

                Class[] params = setMeth.getParameterTypes();
                if (params.length != 1)
                        throw new NoSuchMethodException(
                                "No 1-argument setter for property '" + name
                                        + "'");

                if (params[0].equals(int.class)) {
                    setMeth.invoke(obj, new Object[]{new Integer(pp
                            .getIntProperty(name))});
                } else if (params[0].equals(long.class)) {
                    setMeth.invoke(obj, new Object[]{new Long(pp
                            .getLongProperty(name))});
                } else if (params[0].equals(float.class)) {
                    setMeth.invoke(obj, new Object[]{new Float(pp
                            .getFloatProperty(name))});
                } else if (params[0].equals(double.class)) {
                    setMeth.invoke(obj, new Object[]{new Double(pp
                            .getDoubleProperty(name))});
                } else if (params[0].equals(boolean.class)) {
                    setMeth.invoke(obj, new Object[]{new Boolean(pp
                            .getBooleanProperty(name))});
                } else if (params[0].equals(String.class)) {
                    setMeth.invoke(obj,
                            new Object[]{pp.getStringProperty(name)});
                } else
                    throw new NoSuchMethodException(
                            "No primitive-type setter for property '" + name
                                    + "'");
            } catch (NumberFormatException nfe) {
                throw new SchedulerConfigException("Could not parse property '"
                        + name + "' into correct data type: " + nfe.toString());
            }
        }
    }

    private java.lang.reflect.Method getSetMethod(String name,
            PropertyDescriptor[] props) {
        for (int i = 0; i < props.length; i++) {
            java.lang.reflect.Method wMeth = props[i].getWriteMethod();

            if (wMeth != null && wMeth.getName().equals(name)) return wMeth;
        }

        return null;
    }

    private Class loadClass(String className) throws ClassNotFoundException {

        try {
            return Thread.currentThread().getContextClassLoader().loadClass(
                    className);
        } catch (ClassNotFoundException e) {
            return getClass().getClassLoader().loadClass(className);
        }
    }

    private String getSchedulerName() {
        return cfg.getStringProperty(PROP_SCHED_INSTANCE_NAME,
                "QuartzScheduler");
    }

    private String getSchedulerInstId() {
        return cfg.getStringProperty(PROP_SCHED_INSTANCE_ID,
                DEFAULT_INSTANCE_ID);
    }

    /**
     * <p>
     * Returns a handle to the Scheduler produced by this factory.
     * </p>
     * 
     * <p>
     * If one of the <code>initialize</code> methods has not be previously
     * called, then the default (no-arg) <code>initialize()</code> method
     * will be called by this method.
     * </p>
     */
    public Scheduler getScheduler() throws SchedulerException {
        if (cfg == null) initialize();

        SchedulerRepository schedRep = SchedulerRepository.getInstance();

        Scheduler sched = schedRep.lookup(getSchedulerName());

        if (sched != null) {
            if (sched.isShutdown()) schedRep.remove(getSchedulerName());
            else
                return sched;
        }

        sched = instantiate();

        return sched;
    }

    /**
     * <p>
     * Returns a handle to the default Scheduler, creating it if it does not
     * yet exist.
     * </p>
     * 
     * @see #initialize()
     */
    public static Scheduler getDefaultScheduler() throws SchedulerException {
        StdSchedulerFactory fact = new StdSchedulerFactory();

        return fact.getScheduler();
    }

    /**
     * <p>
     * Returns a handle to the Scheduler with the given name, if it exists (if
     * it has already been instantiated).
     * </p>
     */
    public Scheduler getScheduler(String schedName) throws SchedulerException {
        return SchedulerRepository.getInstance().lookup(schedName);
    }

    /**
     * <p>
     * Returns a handle to all known Schedulers (made by any
     * StdSchedulerFactory instance.).
     * </p>
     */
    public Collection getAllSchedulers() throws SchedulerException {
        return SchedulerRepository.getInstance().lookupAll();
    }

}