1 /*
2 * Copyright 2006-2009 the original author or authors.
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
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 package org.springframework.osgi.extender.internal.dependencies.startup;
17
18 /**
19 * State of an application context while being processed by {@link DependencyWaiterApplicationContextExecutor}.
20 *
21 * This enumeration holds the state of an application context at a certain time, beyond the official states such as
22 * STARTED/STOPPED.
23 *
24 * @author Hal Hildebrand
25 * @author Costin Leau
26 *
27 */
28 public enum ContextState {
29
30 /**
31 * Application context has been initialized but not started (i.e. refresh hasn't been called).
32 */
33 INITIALIZED,
34
35 /**
36 * Application context has been started but the OSGi service dependencies haven't been yet resolved.
37 */
38 RESOLVING_DEPENDENCIES,
39
40 /**
41 * Application context has been started and the OSGi dependencies have been resolved. However the context is not
42 * fully initialized (i.e. refresh hasn't been completed).
43 */
44 DEPENDENCIES_RESOLVED,
45
46 /**
47 * Application context has been fully initialized. The OSGi dependencies have been resolved and refresh has fully
48 * completed.
49 */
50 STARTED,
51
52 /**
53 * Application context has been interrupted. This state occurs if the context is being closed before being fully
54 * started.
55 */
56 INTERRUPTED,
57
58 /**
59 * Application context has been stopped. This can occur even only if the context has been fully started for example;
60 * otherwise {@link #INTERRUPTED} state should be used.
61 */
62 STOPPED;
63
64 /**
65 * Indicates whether the state is 'down' or not - that is a context which has been either closed or stopped.
66 *
67 * @return true if the context has been interrupted or stopped, false otherwise.
68 */
69 public boolean isDown() {
70 return (this.equals(INTERRUPTED) || this.equals(STOPPED));
71 }
72
73 /**
74 * Indicates whether the state is unresolved or not. An unresolved state means a state which is active (started) in
75 * RESOLVING_DEPENDENCIES state.
76 *
77 * @return
78 */
79 public boolean isUnresolved() {
80 return (this.equals(RESOLVING_DEPENDENCIES) || this.equals(INITIALIZED));
81 }
82
83 public boolean isResolved() {
84 return !isUnresolved();
85 }
86 }