Examples of org.quartz.spi.ClassLoadHelper

org.quartz.spi.ClassLoadHelper
An interface for classes wishing to provide the service of loading classes and resources within the scheduler... @author jhouse @author pl47ypus

                bestCandidate = null;
            }
        }


        InputStream result = null;
        ClassLoadHelper loadHelper = null;


        Iterator iter = loadHelpers.iterator();
        while (iter.hasNext()) {
            loadHelper = (ClassLoadHelper) iter.next();


            result = loadHelper.getResourceAsStream(name);
            if (result != null) {
                break;
            }
        }

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      qrs.setThreadExecutor(new DefaultThreadExecutor());
      qrs.setJobStore(store);
      qrs.setRunUpdateCheck(false);
      QuartzScheduler qs = new QuartzScheduler(qrs, -1, -1);


      ClassLoadHelper cch = new CascadingClassLoadHelper();
      cch.initialize();


      store.initialize(cch, qs.getSchedulerSignaler());
      org.quartz.Scheduler scheduler = new StdScheduler(qs);


      jrsf.initialize(scheduler);

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            return remoteScheduler;
        }




        // Create class load helper
        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();


        // If Proxying to remote JMX scheduler, short-circuit here...
        // ~~~~~~~~~~~~~~~~~~
        if (jmxProxy) {
            if (autoId) {
                schedInstId = DEFAULT_INSTANCE_ID;
            }


            if (jmxProxyClass == null) {
                throw new SchedulerConfigException("No JMX Proxy Scheduler class provided");
            }


            RemoteMBeanScheduler jmxScheduler = null;
            try {
                jmxScheduler = (RemoteMBeanScheduler)loadHelper.loadClass(jmxProxyClass)
                        .newInstance();
            } catch (Exception e) {
                throw new SchedulerConfigException(
                        "Unable to instantiate RemoteMBeanScheduler class.", e);
            }


            if (jmxObjectName == null) {
                jmxObjectName = QuartzSchedulerResources.generateJMXObjectName(schedName, schedInstId);
            }


            jmxScheduler.setSchedulerObjectName(jmxObjectName);


            tProps = cfg.getPropertyGroup(PROP_SCHED_JMX_PROXY, true);
            try {
                setBeanProps(jmxScheduler, tProps);
            } catch (Exception e) {
                initException = new SchedulerException("RemoteMBeanScheduler class '"
                        + jmxProxyClass + "' props could not be configured.", e);
                throw initException;
            }


            jmxScheduler.initialize();


            schedRep.bind(jmxScheduler);


            return jmxScheduler;
        }


        
        JobFactory jobFactory = null;
        if(jobFactoryClass != null) {
            try {
                jobFactory = (JobFactory) loadHelper.loadClass(jobFactoryClass)
                        .newInstance();
            } catch (Exception e) {
                throw new SchedulerConfigException(
                        "Unable to instantiate JobFactory class: "
                                + e.getMessage(), e);
            }


            tProps = cfg.getPropertyGroup(PROP_SCHED_JOB_FACTORY_PREFIX, true);
            try {
                setBeanProps(jobFactory, tProps);
            } catch (Exception e) {
                initException = new SchedulerException("JobFactory class '"
                        + jobFactoryClass + "' props could not be configured.", e);
                throw initException;
            }
        }


        InstanceIdGenerator instanceIdGenerator = null;
        if(instanceIdGeneratorClass != null) {
            try {
                instanceIdGenerator = (InstanceIdGenerator) loadHelper.loadClass(instanceIdGeneratorClass)
                    .newInstance();
            } catch (Exception e) {
                throw new SchedulerConfigException(
                        "Unable to instantiate InstanceIdGenerator class: "
                        + e.getMessage(), e);
            }


            tProps = cfg.getPropertyGroup(PROP_SCHED_INSTANCE_ID_GENERATOR_PREFIX, true);
            try {
                setBeanProps(instanceIdGenerator, tProps);
            } catch (Exception e) {
                initException = new SchedulerException("InstanceIdGenerator class '"
                        + instanceIdGeneratorClass + "' props could not be configured.", e);
                throw initException;
            }
        }


        // Get ThreadPool Properties
        // ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~


        String tpClass = cfg.getStringProperty(PROP_THREAD_POOL_CLASS, SimpleThreadPool.class.getName());


        if (tpClass == null) {
            initException = new SchedulerException(
                    "ThreadPool class not specified. ");
            throw initException;
        }


        try {
            tp = (ThreadPool) loadHelper.loadClass(tpClass).newInstance();
        } catch (Exception e) {
            initException = new SchedulerException("ThreadPool class '"
                    + tpClass + "' could not be instantiated.", e);
            throw initException;
        }
        tProps = cfg.getPropertyGroup(PROP_THREAD_POOL_PREFIX, true);
        try {
            setBeanProps(tp, tProps);
        } catch (Exception e) {
            initException = new SchedulerException("ThreadPool class '"
                    + tpClass + "' props could not be configured.", e);
            throw initException;
        }


        // Get JobStore Properties
        // ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~


        String jsClass = cfg.getStringProperty(PROP_JOB_STORE_CLASS,
                RAMJobStore.class.getName());


        if (jsClass == null) {
            initException = new SchedulerException(
                    "JobStore class not specified. ");
            throw initException;
        }


        try {
            js = (JobStore) loadHelper.loadClass(jsClass).newInstance();
        } catch (Exception e) {
            initException = new SchedulerException("JobStore class '" + jsClass
                    + "' could not be instantiated.", e);
            throw initException;
        }


        SchedulerDetailsSetter.setDetails(js, schedName, schedInstId);


        tProps = cfg.getPropertyGroup(PROP_JOB_STORE_PREFIX, true, new String[] {PROP_JOB_STORE_LOCK_HANDLER_PREFIX});
        try {
            setBeanProps(js, tProps);
        } catch (Exception e) {
            initException = new SchedulerException("JobStore class '" + jsClass
                    + "' props could not be configured.", e);
            throw initException;
        }


        if (js instanceof JobStoreSupport) {
            // Install custom lock handler (Semaphore)
            String lockHandlerClass = cfg.getStringProperty(PROP_JOB_STORE_LOCK_HANDLER_CLASS);
            if (lockHandlerClass != null) {
                try {
                    Semaphore lockHandler = (Semaphore)loadHelper.loadClass(lockHandlerClass).newInstance();


                    tProps = cfg.getPropertyGroup(PROP_JOB_STORE_LOCK_HANDLER_PREFIX, true);


                    // If this lock handler requires the table prefix, add it to its properties.
                    if (lockHandler instanceof TablePrefixAware) {
                        tProps.setProperty(
                                PROP_TABLE_PREFIX, ((JobStoreSupport)js).getTablePrefix());
                        tProps.setProperty(
                                PROP_SCHED_NAME, schedName);
                    }


                    try {
                        setBeanProps(lockHandler, tProps);
                    } catch (Exception e) {
                        initException = new SchedulerException("JobStore LockHandler class '" + lockHandlerClass
                                + "' props could not be configured.", e);
                        throw initException;
                    }


                    ((JobStoreSupport)js).setLockHandler(lockHandler);
                    getLog().info("Using custom data access locking (synchronization): " + lockHandlerClass);
                } catch (Exception e) {
                    initException = new SchedulerException("JobStore LockHandler class '" + lockHandlerClass
                            + "' could not be instantiated.", e);
                    throw initException;
                }
            }
        }


        // Set up any DataSources
        // ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~


        String[] dsNames = cfg.getPropertyGroups(PROP_DATASOURCE_PREFIX);
        for (int i = 0; i < dsNames.length; i++) {
            PropertiesParser pp = new PropertiesParser(cfg.getPropertyGroup(
                    PROP_DATASOURCE_PREFIX + "." + dsNames[i], true));


            String cpClass = pp.getStringProperty(PROP_CONNECTION_PROVIDER_CLASS, null);


            // custom connectionProvider...
            if(cpClass != null) {
                ConnectionProvider cp = null;
                try {
                    cp = (ConnectionProvider) loadHelper.loadClass(cpClass).newInstance();
                } catch (Exception e) {
                    initException = new SchedulerException("ConnectionProvider class '" + cpClass
                            + "' could not be instantiated.", e);
                    throw initException;
                }


                try {
                    // remove the class name, so it isn't attempted to be set
                    pp.getUnderlyingProperties().remove(
                            PROP_CONNECTION_PROVIDER_CLASS);


                    setBeanProps(cp, pp.getUnderlyingProperties());
                    cp.initialize();
                } catch (Exception e) {
                    initException = new SchedulerException("ConnectionProvider class '" + cpClass
                            + "' props could not be configured.", e);
                    throw initException;
                }


                dbMgr = DBConnectionManager.getInstance();
                dbMgr.addConnectionProvider(dsNames[i], cp);
            } else {
                String dsJndi = pp.getStringProperty(PROP_DATASOURCE_JNDI_URL, null);


                if (dsJndi != null) {
                    boolean dsAlwaysLookup = pp.getBooleanProperty(
                            PROP_DATASOURCE_JNDI_ALWAYS_LOOKUP);
                    String dsJndiInitial = pp.getStringProperty(
                            PROP_DATASOURCE_JNDI_INITIAL);
                    String dsJndiProvider = pp.getStringProperty(
                            PROP_DATASOURCE_JNDI_PROVDER);
                    String dsJndiPrincipal = pp.getStringProperty(
                            PROP_DATASOURCE_JNDI_PRINCIPAL);
                    String dsJndiCredentials = pp.getStringProperty(
                            PROP_DATASOURCE_JNDI_CREDENTIALS);
                    Properties props = null;
                    if (null != dsJndiInitial || null != dsJndiProvider
                            || null != dsJndiPrincipal || null != dsJndiCredentials) {
                        props = new Properties();
                        if (dsJndiInitial != null) {
                            props.put(PROP_DATASOURCE_JNDI_INITIAL,
                                    dsJndiInitial);
                        }
                        if (dsJndiProvider != null) {
                            props.put(PROP_DATASOURCE_JNDI_PROVDER,
                                    dsJndiProvider);
                        }
                        if (dsJndiPrincipal != null) {
                            props.put(PROP_DATASOURCE_JNDI_PRINCIPAL,
                                    dsJndiPrincipal);
                        }
                        if (dsJndiCredentials != null) {
                            props.put(PROP_DATASOURCE_JNDI_CREDENTIALS,
                                    dsJndiCredentials);
                        }
                    }
                    JNDIConnectionProvider cp = new JNDIConnectionProvider(dsJndi,
                            props, dsAlwaysLookup);
                    dbMgr = DBConnectionManager.getInstance();
                    dbMgr.addConnectionProvider(dsNames[i], cp);
                } else {
                    String dsDriver = pp.getStringProperty(PoolingConnectionProvider.DB_DRIVER);
                    String dsURL = pp.getStringProperty(PoolingConnectionProvider.DB_URL);


                    if (dsDriver == null) {
                        initException = new SchedulerException(
                                "Driver not specified for DataSource: "
                                        + dsNames[i]);
                        throw initException;
                    }
                    if (dsURL == null) {
                        initException = new SchedulerException(
                                "DB URL not specified for DataSource: "
                                        + dsNames[i]);
                        throw initException;
                    }
                    try {
                        PoolingConnectionProvider cp = new PoolingConnectionProvider(pp.getUnderlyingProperties());
                        dbMgr = DBConnectionManager.getInstance();
                        dbMgr.addConnectionProvider(dsNames[i], cp);
                    } catch (SQLException sqle) {
                        initException = new SchedulerException(
                                "Could not initialize DataSource: " + dsNames[i],
                                sqle);
                        throw initException;
                    }
                }


            }


        }


        // Set up any SchedulerPlugins
        // ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~


        String[] pluginNames = cfg.getPropertyGroups(PROP_PLUGIN_PREFIX);
        SchedulerPlugin[] plugins = new SchedulerPlugin[pluginNames.length];
        for (int i = 0; i < pluginNames.length; i++) {
            Properties pp = cfg.getPropertyGroup(PROP_PLUGIN_PREFIX + "."
                    + pluginNames[i], true);


            String plugInClass = pp.getProperty(PROP_PLUGIN_CLASS, null);


            if (plugInClass == null) {
                initException = new SchedulerException(
                        "SchedulerPlugin class not specified for plugin '"
                                + pluginNames[i] + "'");
                throw initException;
            }
            SchedulerPlugin plugin = null;
            try {
                plugin = (SchedulerPlugin)
                        loadHelper.loadClass(plugInClass).newInstance();
            } catch (Exception e) {
                initException = new SchedulerException(
                        "SchedulerPlugin class '" + plugInClass
                                + "' could not be instantiated.", e);
                throw initException;
            }
            try {
                setBeanProps(plugin, pp);
            } catch (Exception e) {
                initException = new SchedulerException(
                        "JobStore SchedulerPlugin '" + plugInClass
                                + "' props could not be configured.", e);
                throw initException;
            }


            plugins[i] = plugin;
        }


        // Set up any JobListeners
        // ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~


        Class<?>[] strArg = new Class[] { String.class };
        String[] jobListenerNames = cfg.getPropertyGroups(PROP_JOB_LISTENER_PREFIX);
        JobListener[] jobListeners = new JobListener[jobListenerNames.length];
        for (int i = 0; i < jobListenerNames.length; i++) {
            Properties lp = cfg.getPropertyGroup(PROP_JOB_LISTENER_PREFIX + "."
                    + 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] + "'");
                throw initException;
            }
            JobListener listener = null;
            try {
                listener = (JobListener)
                       loadHelper.loadClass(listenerClass).newInstance();
            } catch (Exception e) {
                initException = new SchedulerException(
                        "JobListener class '" + listenerClass
                                + "' could not be instantiated.", e);
                throw initException;
            }
            try {
                Method nameSetter = null;
                try { 
                    nameSetter = listener.getClass().getMethod("setName", strArg);
                }
                catch(NoSuchMethodException ignore) { 
                    /* do nothing */ 
                }
                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);
                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] + "'");
                throw initException;
            }
            TriggerListener listener = null;
            try {
                listener = (TriggerListener)
                       loadHelper.loadClass(listenerClass).newInstance();
            } catch (Exception e) {
                initException = new SchedulerException(
                        "TriggerListener class '" + listenerClass
                                + "' could not be instantiated.", e);
                throw initException;
            }
            try {
                Method nameSetter = null;
                try { 
                    nameSetter = listener.getClass().getMethod("setName", strArg);
                }
                catch(NoSuchMethodException ignore) { /* do nothing */ }
                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);
                throw initException;
            }
            triggerListeners[i] = listener;
        }


        boolean tpInited = false;
        boolean qsInited = false;




        // Get ThreadExecutor Properties
        // ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~


        String threadExecutorClass = cfg.getStringProperty(PROP_THREAD_EXECUTOR_CLASS);
        if (threadExecutorClass != null) {
            tProps = cfg.getPropertyGroup(PROP_THREAD_EXECUTOR, true);
            try {
                threadExecutor = (ThreadExecutor) loadHelper.loadClass(threadExecutorClass).newInstance();
                log.info("Using custom implementation for ThreadExecutor: " + threadExecutorClass);


                setBeanProps(threadExecutor, tProps);
            } catch (Exception e) {
                initException = new SchedulerException(

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            }
        }


        Throwable throwable = null;
        Class<?> clazz = null;
        ClassLoadHelper loadHelper = null;


        Iterator<ClassLoadHelper> iter = loadHelpers.iterator();
        while (iter.hasNext()) {
            loadHelper = iter.next();


            try {
                clazz = loadHelper.loadClass(name);
                break;
            } catch (Throwable t) {
                throwable = t;
            }
        }

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            else {
                return result;
            }
        }


        ClassLoadHelper loadHelper = null;


        Iterator<ClassLoadHelper> iter = loadHelpers.iterator();
        while (iter.hasNext()) {
            loadHelper = iter.next();


            result = loadHelper.getResource(name);
            if (result != null) {
                break;
            }
        }

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            else {
                return result;
            }
        }


        ClassLoadHelper loadHelper = null;


        Iterator<ClassLoadHelper> iter = loadHelpers.iterator();
        while (iter.hasNext()) {
            loadHelper = iter.next();


            result = loadHelper.getResourceAsStream(name);
            if (result != null) {
                break;
            }
        }

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            }
        }


        QuartzScheduler qs = new QuartzScheduler(qrs, idleWaitTime, dbFailureRetryInterval);


        ClassLoadHelper cch = new CascadingClassLoadHelper();
        cch.initialize();


        SchedulerDetailsSetter.setDetails(jobStore, schedulerName, schedulerInstanceId);


        jobStore.initialize(cch, qs.getSchedulerSignaler());

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      transactionStatus = this.transactionManager.getTransaction(new DefaultTransactionDefinition());
    }


    try {
      if (this.jobSchedulingDataLocations != null) {
        ClassLoadHelper clh = new ResourceLoaderClassLoadHelper(this.resourceLoader);
        clh.initialize();
        XMLSchedulingDataProcessor dataProcessor = new XMLSchedulingDataProcessor(clh);
        for (String location : this.jobSchedulingDataLocations) {
          dataProcessor.processFileAndScheduleJobs(location, getScheduler());
        }
      }

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      transactionStatus = this.transactionManager.getTransaction(new DefaultTransactionDefinition());
    }
    try {


      if (this.jobSchedulingDataLocations != null) {
        ClassLoadHelper clh = new ResourceLoaderClassLoadHelper(this.resourceLoader);
        clh.initialize();
        JobSchedulingDataProcessor dataProcessor = new JobSchedulingDataProcessor(clh, true, true);
        for (String location : this.jobSchedulingDataLocations) {
          dataProcessor.processFileAndScheduleJobs(location, getScheduler(), this.overwriteExistingJobs);
        }
      }

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        loadHelpers.add(new ThreadContextClassLoadHelper());
        loadHelpers.add(new InitThreadContextClassLoadHelper());
        
        Iterator iter = loadHelpers.iterator();
        while (iter.hasNext()) {
            ClassLoadHelper loadHelper = (ClassLoadHelper) iter.next();
            loadHelper.initialize();
        }
    }

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