01: /*
02: * $Id: DefaultEntryPointResolverSet.java 10529 2008-01-25 05:58:36Z dfeist $
03: * --------------------------------------------------------------------------------------
04: * Copyright (c) MuleSource, Inc. All rights reserved. http://www.mulesource.com
05: *
06: * The software in this package is published under the terms of the CPAL v1.0
07: * license, a copy of which has been included with this distribution in the
08: * LICENSE.txt file.
09: */
10: package org.mule.model.resolvers;
11:
12: import org.mule.api.MuleEventContext;
13: import org.mule.api.model.EntryPointResolver;
14: import org.mule.api.model.EntryPointResolverSet;
15: import org.mule.api.model.InvocationResult;
16: import org.mule.util.CollectionUtils;
17:
18: import java.util.Iterator;
19: import java.util.LinkedHashSet;
20: import java.util.List;
21: import java.util.Set;
22:
23: import edu.emory.mathcs.backport.java.util.concurrent.CopyOnWriteArrayList;
24:
25: import org.apache.commons.logging.Log;
26: import org.apache.commons.logging.LogFactory;
27:
28: /**
29: * Provides the default implementation of an {@link org.mule.api.model.EntryPointResolverSet}
30: * It resolves a method to call on the given service when an event is received.
31: * This object maintains a set of Resolvers that will be used in order to resolve
32: * an entrypoint on a service object until one is found or until the set is
33: * exhausted.
34: */
35: public class DefaultEntryPointResolverSet implements
36: EntryPointResolverSet {
37:
38: protected final Log logger = LogFactory.getLog(getClass());
39:
40: private final Set entryPointResolvers = new LinkedHashSet(4);
41: private List exceptions = new CopyOnWriteArrayList();
42:
43: public Object invoke(Object component, MuleEventContext context)
44: throws Exception {
45: try {
46: for (Iterator iterator = entryPointResolvers.iterator(); iterator
47: .hasNext();) {
48: EntryPointResolver resolver = (EntryPointResolver) iterator
49: .next();
50: InvocationResult result = resolver.invoke(component,
51: context);
52: if (result.getState() == InvocationResult.STATE_INVOKED_SUCESSFUL) {
53: return result.getResult();
54: } else {
55: if (result.hasError()) {
56: exceptions.add(result.getErrorMessage());
57: }
58: }
59: }
60: throw new EntryPointNotFoundException(CollectionUtils
61: .toString(exceptions, true));
62: } finally {
63: exceptions.clear();
64: }
65:
66: }
67:
68: public Set getEntryPointResolvers() {
69: return entryPointResolvers;
70: }
71:
72: public void setEntryPointResolvers(Set entryPointResolvers) {
73: this .entryPointResolvers.clear();
74: this .entryPointResolvers.addAll(entryPointResolvers);
75: }
76:
77: public void addEntryPointResolver(EntryPointResolver resolver) {
78: synchronized (entryPointResolvers) {
79: this .entryPointResolvers.add(resolver);
80: }
81: }
82:
83: public boolean removeEntryPointResolver(EntryPointResolver resolver) {
84: return this.entryPointResolvers.remove(resolver);
85: }
86: }
|