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comparison software/eXist/mpdl-modules/src/de/mpg/mpiwg/berlin/mpdl/donatus/xmlrpc/DonatusBerkeleyDbEnv.java @ 0:408254cf2f1d

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Erstellung
author Josef Willenborg <jwillenborg@mpiwg-berlin.mpg.de>
date Wed, 24 Nov 2010 17:24:23 +0100
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-1:000000000000 0:408254cf2f1d
1 package de.mpg.mpiwg.berlin.mpdl.donatus.xmlrpc;
2
3 import java.io.File;
4
5 import com.sleepycat.je.Database;
6 import com.sleepycat.je.DatabaseConfig;
7 import com.sleepycat.je.DatabaseException;
8 import com.sleepycat.je.Environment;
9 import com.sleepycat.je.EnvironmentConfig;
10
11 public class DonatusBerkeleyDbEnv {
12 private File envPath;
13 private Environment env;
14 private Database lemmaDb;
15 private Database variantDb;
16
17 public DonatusBerkeleyDbEnv() {
18 }
19
20 public void setup(boolean readOnly) throws DatabaseException {
21 EnvironmentConfig envConfig = new EnvironmentConfig();
22 DatabaseConfig dbConfig = new DatabaseConfig();
23 // If the environment is read-only, then make the databases read-only too.
24 envConfig.setReadOnly(readOnly);
25 dbConfig.setReadOnly(readOnly);
26 // If the environment is opened for write, then we want to be able to create the environment and databases if they do not exist.
27 envConfig.setAllowCreate(!readOnly);
28 dbConfig.setAllowCreate(!readOnly);
29 // Allow transactions if we are writing to the database
30 envConfig.setTransactional(!readOnly);
31 dbConfig.setTransactional(!readOnly);
32 // Open the environment
33 envPath = new File(DonatusConstants.BERKELEY_DB_DIR);
34 env = new Environment(envPath, envConfig);
35 // open databases (and create them if not existent)
36 lemmaDb = env.openDatabase(null, "LemmaDB", dbConfig);
37 variantDb = env.openDatabase(null, "VariantDB", dbConfig);
38 }
39
40 public void removeDatabases() {
41 try {
42 lemmaDb.close();
43 variantDb.close();
44 env.removeDatabase(null, "LemmaDB");
45 env.removeDatabase(null, "VariantDB");
46 } catch (DatabaseException e) {
47 e.printStackTrace(); // TODO
48 }
49 }
50
51 public Environment getEnv() {
52 return env;
53 }
54
55 public Database getLemmaDB() {
56 return lemmaDb;
57 }
58
59 public Database getVariantDB() {
60 return variantDb;
61 }
62
63 public void close() {
64 if (env != null) {
65 try {
66 lemmaDb.close();
67 variantDb.close();
68 env.close();
69 } catch(DatabaseException e) {
70 e.printStackTrace(); // TODO
71 }
72 }
73 }
74 }
75