01: // Copyright 2007 The Apache Software Foundation
02: //
03: // Licensed under the Apache License, Version 2.0 (the "License");
04: // you may not use this file except in compliance with the License.
05: // You may obtain a copy of the License at
06: //
07: // http://www.apache.org/licenses/LICENSE-2.0
08: //
09: // Unless required by applicable law or agreed to in writing, software
10: // distributed under the License is distributed on an "AS IS" BASIS,
11: // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12: // See the License for the specific language governing permissions and
13: // limitations under the License.
14:
15: package org.apache.tapestry.spring;
16:
17: import javax.servlet.ServletContext;
18:
19: import org.apache.tapestry.TapestryFilter;
20: import org.apache.tapestry.internal.spring.SpringModuleDef;
21: import org.apache.tapestry.ioc.def.ModuleDef;
22: import org.springframework.context.ApplicationContext;
23: import org.springframework.web.context.WebApplicationContext;
24:
25: /**
26: * Adds a {@link ModuleDef} that contains all the beans defined by the Spring
27: * {@link ApplicationContext}, as if they were Tapestry IoC services. This is done using a filter,
28: * so that the Spring beans can be "mixed into" the Tapestry IoC Registry before it even starts up.
29: */
30: public class TapestrySpringFilter extends TapestryFilter {
31: @Override
32: protected ModuleDef[] provideExtraModuleDefs(ServletContext context) {
33: ApplicationContext springContext = null;
34:
35: try {
36: springContext = (ApplicationContext) context
37: .getAttribute(WebApplicationContext.ROOT_WEB_APPLICATION_CONTEXT_ATTRIBUTE);
38: } catch (Exception ex) {
39: throw new RuntimeException(SpringMessages
40: .failureObtainingContext(ex), ex);
41: }
42:
43: if (springContext == null)
44: throw new RuntimeException(SpringMessages.missingContext());
45:
46: return new ModuleDef[] { new SpringModuleDef(springContext) };
47: }
48: }
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