Source Code Cross Referenced for QuartzJobBean.java in  » J2EE » spring-framework-2.5 » org » springframework » scheduling » quartz » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » J2EE » spring framework 2.5 » org.springframework.scheduling.quartz 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


01:        /*
02:         * Copyright 2002-2006 the original author or authors.
03:         *
04:         * Licensed under the Apache License, Version 2.0 (the "License");
05:         * you may not use this file except in compliance with the License.
06:         * You may obtain a copy of the License at
07:         *
08:         *      http://www.apache.org/licenses/LICENSE-2.0
09:         *
10:         * Unless required by applicable law or agreed to in writing, software
11:         * distributed under the License is distributed on an "AS IS" BASIS,
12:         * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13:         * See the License for the specific language governing permissions and
14:         * limitations under the License.
15:         */
16:
17:        package org.springframework.scheduling.quartz;
18:
19:        import org.quartz.Job;
20:        import org.quartz.JobExecutionContext;
21:        import org.quartz.JobExecutionException;
22:        import org.quartz.SchedulerException;
23:
24:        import org.springframework.beans.BeanWrapper;
25:        import org.springframework.beans.BeanWrapperImpl;
26:        import org.springframework.beans.MutablePropertyValues;
27:
28:        /**
29:         * Simple implementation of the Quartz Job interface, applying the
30:         * passed-in JobDataMap and also the SchedulerContext as bean property
31:         * values. This is appropriate because a new Job instance will be created
32:         * for each execution. JobDataMap entries will override SchedulerContext
33:         * entries with the same keys.
34:         *
35:         * <p>For example, let's assume that the JobDataMap contains a key
36:         * "myParam" with value "5": The Job implementation can then expose
37:         * a bean property "myParam" of type int to receive such a value,
38:         * i.e. a method "setMyParam(int)". This will also work for complex
39:         * types like business objects etc.
40:         *
41:         * <p>Note: The QuartzJobBean class itself only implements the standard
42:         * Quartz {@link org.quartz.Job} interface. Let your subclass explicitly
43:         * implement the Quartz {@link org.quartz.StatefulJob} interface to
44:         * mark your concrete job bean as stateful.
45:         *
46:         * <p>This version of QuartzJobBean requires Quartz 1.5 or higher,
47:         * due to the support for trigger-specific job data.
48:         *
49:         * <p><b>Note that as of Spring 2.0 and Quartz 1.5, the preferred way
50:         * to apply dependency injection to Job instances is via a JobFactory:</b>
51:         * that is, to specify {@link SpringBeanJobFactory} as Quartz JobFactory
52:         * (typically via
53:         * {@link SchedulerFactoryBean#setJobFactory} SchedulerFactoryBean's "jobFactory" property}).
54:         * This allows to implement dependency-injected Quartz Jobs without
55:         * a dependency on Spring base classes.
56:         *
57:         * @author Juergen Hoeller
58:         * @since 18.02.2004
59:         * @see org.quartz.JobExecutionContext#getMergedJobDataMap()
60:         * @see org.quartz.Scheduler#getContext()
61:         * @see JobDetailBean#setJobDataAsMap
62:         * @see SimpleTriggerBean#setJobDataAsMap
63:         * @see CronTriggerBean#setJobDataAsMap
64:         * @see SchedulerFactoryBean#setSchedulerContextAsMap
65:         * @see SpringBeanJobFactory
66:         * @see SchedulerFactoryBean#setJobFactory
67:         */
68:        public abstract class QuartzJobBean implements  Job {
69:
70:            /**
71:             * This implementation applies the passed-in job data map as bean property
72:             * values, and delegates to <code>executeInternal</code> afterwards.
73:             * @see #executeInternal
74:             */
75:            public final void execute(JobExecutionContext context)
76:                    throws JobExecutionException {
77:                try {
78:                    BeanWrapper bw = new BeanWrapperImpl(this );
79:                    MutablePropertyValues pvs = new MutablePropertyValues();
80:                    pvs.addPropertyValues(context.getScheduler().getContext());
81:                    pvs.addPropertyValues(context.getMergedJobDataMap());
82:                    bw.setPropertyValues(pvs, true);
83:                } catch (SchedulerException ex) {
84:                    throw new JobExecutionException(ex);
85:                }
86:                executeInternal(context);
87:            }
88:
89:            /**
90:             * Execute the actual job. The job data map will already have been
91:             * applied as bean property values by execute. The contract is
92:             * exactly the same as for the standard Quartz execute method.
93:             * @see #execute
94:             */
95:            protected abstract void executeInternal(JobExecutionContext context)
96:                    throws JobExecutionException;
97:
98:        }
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