1 /*
2 * Copyright 2012-2013 smartics, Kronseder & Reiner GmbH
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 de.smartics.properties.impl.config.ds;
17
18 import java.io.Serializable;
19
20 import javax.naming.Context;
21 import javax.naming.InitialContext;
22
23 import de.smartics.properties.api.core.app.JndiContext;
24
25 /**
26 * Responsible to read JNDI configuration properties to connect to a data source
27 * stored via JNDI.
28 */
29 public class DataSourceConfigurationJndiLoader implements Serializable
30 {
31 // ********************************* Fields *********************************
32
33 // --- constants ------------------------------------------------------------
34
35 /**
36 * The class version identifier.
37 * <p>
38 * The value of this constant is {@value}.
39 * </p>
40 */
41 private static final long serialVersionUID = 1L;
42
43 // --- members --------------------------------------------------------------
44
45 // ****************************** Initializer *******************************
46
47 // ****************************** Constructors ******************************
48
49 /**
50 * Default constructor.
51 */
52 public DataSourceConfigurationJndiLoader()
53 {
54 }
55
56 // ****************************** Inner Classes *****************************
57
58 // ********************************* Methods ********************************
59
60 // --- init -----------------------------------------------------------------
61
62 // --- get&set --------------------------------------------------------------
63
64 // --- business -------------------------------------------------------------
65
66 /**
67 * Loads the data source configuration.
68 *
69 * @return the data source configuration.
70 * @throws IllegalStateException if the configuration cannot be loaded.
71 */
72 public DataSourceConfiguration load() throws IllegalStateException
73 {
74 try
75 {
76 final Context context = new InitialContext();
77 final JndiContext lookup = JndiContext.boot(context);
78 final String jndiName = lookup.lookup(DataSourceConfiguration.JNDI_NAME);
79
80 if (jndiName == null)
81 {
82 throw new IllegalStateException(String.format(
83 "Cannot find '%s' in the JNDI context to configure the"
84 + " access to a data source.",
85 DataSourceConfiguration.JNDI_NAME));
86 }
87
88 final boolean createTable =
89 lookup.lookupBoolean(DataSourceConfiguration.CREATE_TABLE);
90 final boolean dropTable =
91 lookup.lookupBoolean(DataSourceConfiguration.DROP_TABLE);
92
93 final DataSourceConfigurationBuilder builder =
94 new DataSourceConfigurationBuilder();
95 builder.setConfigSourceId(lookup.getSourceId());
96 builder.setJndiName(jndiName);
97 builder.setCreateTable(createTable);
98 builder.setDropTable(dropTable);
99
100 final DataSourceConfiguration config = builder.build();
101 return config;
102 }
103 catch (final Exception e)
104 {
105 throw new IllegalStateException(
106 String.format("Cannot access JNDI context to configure the access to"
107 + " a data source."), e);
108 }
109 }
110
111 // --- object basics --------------------------------------------------------
112
113 }