01: /*
02: * Copyright 2004-2006 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.compass.spring.device.ojb;
18:
19: import org.aopalliance.intercept.MethodInterceptor;
20: import org.aopalliance.intercept.MethodInvocation;
21: import org.apache.ojb.broker.PersistenceBroker;
22: import org.compass.gps.device.ojb.OjbGpsDeviceUtils;
23: import org.springframework.beans.factory.InitializingBean;
24: import org.springframework.orm.ojb.OjbFactoryUtils;
25: import org.springframework.orm.ojb.PersistenceBrokerTemplate;
26:
27: /**
28: * Uses Spring's AOP capabilities to attach and remove lifecycle event listeners
29: * to the <code>PersistenceBroker</code> (the device acts as the listener).
30: * Uses <code>OjbGpsDeviceUtils</code> to perform it on the supplied
31: * {@link org.compass.spring.device.ojb.SpringOjbGpsDevice}.
32: * <p>
33: * Mainly used as a post interceptor with transaction proxies that manage
34: * service layer operations on an OJB enabled DAO layer.
35: *
36: * @author kimchy
37: */
38: public class SpringOjbGpsDeviceInterceptor implements
39: MethodInterceptor, InitializingBean {
40:
41: private SpringOjbGpsDevice ojbGpsDevice;
42:
43: public void afterPropertiesSet() throws Exception {
44: if (ojbGpsDevice == null) {
45: throw new IllegalArgumentException(
46: "Must set the ojbGpsDevice property");
47: }
48: }
49:
50: /**
51: * Wraps the method invocation with attaching and removing lifecycle event
52: * listeners from <code>PersistenceBroker</code>.
53: */
54: public Object invoke(MethodInvocation methodInvocation)
55: throws Throwable {
56: PersistenceBroker pb = OjbFactoryUtils.getPersistenceBroker(
57: getPersistenceBrokerTemplate().getPbKey(),
58: getPersistenceBrokerTemplate().isAllowCreate());
59: OjbGpsDeviceUtils.attachPersistenceBrokerForMirror(
60: ojbGpsDevice, pb);
61: try {
62: return methodInvocation.proceed();
63: } finally {
64: OjbGpsDeviceUtils.removePersistenceBrokerForMirror(
65: ojbGpsDevice, pb);
66: }
67: }
68:
69: private PersistenceBrokerTemplate getPersistenceBrokerTemplate() {
70: return ojbGpsDevice.getPersistenceBrokerTemplate();
71: }
72:
73: /**
74: * Removes the <code>SpringOjbGpsDevice</code> to be used to attach and
75: * remove OJB lifecycle event listeners.
76: */
77: public SpringOjbGpsDevice getOjbGpsDevice() {
78: return ojbGpsDevice;
79: }
80:
81: /**
82: * Sets the <code>SpringOjbGpsDevice</code> to be used to attach and
83: * remove OJB lifecycle event listeners.
84: *
85: * @param ojbGpsDevice
86: */
87: public void setOjbGpsDevice(SpringOjbGpsDevice ojbGpsDevice) {
88: this.ojbGpsDevice = ojbGpsDevice;
89: }
90: }
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