1 package org.apache.onami.persist;
2
3 /*
4 * Licensed to the Apache Software Foundation (ASF) under one
5 * or more contributor license agreements. See the NOTICE file
6 * distributed with this work for additional information
7 * regarding copyright ownership. The ASF licenses this file
8 * to you under the Apache License, Version 2.0 (the
9 * "License"); you may not use this file except in compliance
10 * with the License. You may obtain a copy of the License at
11 *
12 * http://www.apache.org/licenses/LICENSE-2.0
13 *
14 * Unless required by applicable law or agreed to in writing,
15 * software distributed under the License is distributed on an
16 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
17 * KIND, either express or implied. See the License for the
18 * specific language governing permissions and limitations
19 * under the License.
20 */
21
22 import javax.inject.Inject;
23 import javax.servlet.FilterChain;
24 import javax.servlet.FilterConfig;
25 import javax.servlet.ServletException;
26 import javax.servlet.ServletRequest;
27 import javax.servlet.ServletResponse;
28 import java.io.IOException;
29
30 import static org.apache.onami.persist.Preconditions.checkNotNull;
31
32 /**
33 * Implementation of {@link PersistenceFilter}.
34 */
35 class PersistenceFilterImpl
36 implements PersistenceFilter
37 {
38
39 /**
40 * Container of all known persistence services.
41 */
42 private final AllPersistenceServices allPersistenceServices;
43
44 /**
45 * Container of all known units of work.
46 */
47 private final AllUnitsOfWork allUnitsOfWork;
48
49 /**
50 * Constructor.
51 *
52 * @param allPersistenceServices container of all known persistence services.
53 * @param allUnitsOfWork container of all known units of work.
54 */
55 @Inject
56 PersistenceFilterImpl( AllPersistenceServices allPersistenceServices, AllUnitsOfWork allUnitsOfWork )
57 {
58 this.allPersistenceServices = checkNotNull( allPersistenceServices, "allPersistenceServices is mandatory!" );
59 this.allUnitsOfWork = checkNotNull( allUnitsOfWork, "allUnitsOfWork is mandatory!" );
60 }
61
62 /**
63 * {@inheritDoc}
64 */
65 // @Override
66 public void doFilter( ServletRequest request, ServletResponse response, FilterChain chain )
67 throws IOException, ServletException
68 {
69 try
70 {
71 allUnitsOfWork.beginAllInactiveUnitsOfWork();
72 chain.doFilter( request, response );
73 }
74 finally
75 {
76 allUnitsOfWork.endAllUnitsOfWork();
77 }
78 }
79
80 /**
81 * {@inheritDoc}
82 */
83 // @Override
84 public void init( FilterConfig filterConfig )
85 throws ServletException
86 {
87 allPersistenceServices.startAllStoppedPersistenceServices();
88 }
89
90 /**
91 * {@inheritDoc}
92 */
93 // @Override
94 public void destroy()
95 {
96 allPersistenceServices.stopAllPersistenceServices();
97 }
98
99 }