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