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.config.ds.DataSourceConfiguration;
24 import de.smartics.properties.api.core.app.JndiContext;
25
26 /**
27 * Responsible to read JNDI configuration properties to connect to a data source
28 * stored via JNDI.
29 */
30 public class DataSourceConfigurationJndiLoader implements Serializable
31 {
32 // ********************************* Fields *********************************
33
34 // --- constants ------------------------------------------------------------
35
36 /**
37 * The class version identifier.
38 * <p>
39 * The value of this constant is {@value}.
40 * </p>
41 */
42 private static final long serialVersionUID = 1L;
43
44 // --- members --------------------------------------------------------------
45
46 // ****************************** Initializer *******************************
47
48 // ****************************** Constructors ******************************
49
50 /**
51 * Default constructor.
52 */
53 public DataSourceConfigurationJndiLoader()
54 {
55 }
56
57 // ****************************** Inner Classes *****************************
58
59 // ********************************* Methods ********************************
60
61 // --- init -----------------------------------------------------------------
62
63 // --- get&set --------------------------------------------------------------
64
65 // --- business -------------------------------------------------------------
66
67 /**
68 * Loads the data source configuration.
69 *
70 * @return the data source configuration.
71 * @throws IllegalStateException if the configuration cannot be loaded.
72 */
73 public DataSourceConfiguration load() throws IllegalStateException
74 {
75 try
76 {
77 final Context context = new InitialContext();
78 final JndiContext lookup = JndiContext.boot(context);
79 final String jndiName = lookup.lookup(DataSourceConfiguration.JNDI_NAME);
80
81 if (jndiName == null)
82 {
83 throw new IllegalStateException(String.format(
84 "Cannot find '%s' in the JNDI context to configure the"
85 + " access to a data source.",
86 DataSourceConfiguration.JNDI_NAME));
87 }
88
89 final boolean createTable =
90 lookup.lookupBoolean(DataSourceConfiguration.CREATE_TABLE);
91 final boolean dropTable =
92 lookup.lookupBoolean(DataSourceConfiguration.DROP_TABLE);
93
94 final DataSourceConfigurationBuilder builder =
95 new DataSourceConfigurationBuilder();
96 builder.setConfigSourceId(lookup.getSourceId());
97 builder.setJndiName(jndiName);
98 builder.setCreateTable(createTable);
99 builder.setDropTable(dropTable);
100
101 final DataSourceConfiguration config = builder.build();
102 return config;
103 }
104 catch (final Exception e)
105 {
106 throw new IllegalStateException(
107 String.format("Cannot access JNDI context to configure the access to"
108 + " a data source."), e);
109 }
110 }
111
112 // --- object basics --------------------------------------------------------
113
114 }