01 /*
02 * Copyright 2009-2012 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 griffon.core;
18
19 import java.util.Map;
20
21 /**
22 * Helper class capable of dealing with services.
23 *
24 * @author Andres Almiray
25 * @since 0.9.4
26 */
27 public interface ServiceManager extends ApplicationHandler {
28 /**
29 * Returns a read-only view of all available services
30 *
31 * @return a non-null Map of services keyed by name
32 */
33 Map<String, GriffonService> getServices();
34
35 /**
36 * Finds an service by name.<p>
37 * Never returns null for a matching service name.
38 * If a service instance is not yet available then this method will create it.
39 *
40 * @param name the name of the service to search for
41 * @return a service instance if there's a match, null otherwise.
42 */
43 GriffonService findService(String name);
44 }
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