diff options
Diffstat (limited to 'qpid/java/bdbstore/src/main/java/org/apache/qpid/server/store/berkeleydb/StandardEnvironmentFacade.java')
| -rw-r--r-- | qpid/java/bdbstore/src/main/java/org/apache/qpid/server/store/berkeleydb/StandardEnvironmentFacade.java | 228 |
1 files changed, 228 insertions, 0 deletions
diff --git a/qpid/java/bdbstore/src/main/java/org/apache/qpid/server/store/berkeleydb/StandardEnvironmentFacade.java b/qpid/java/bdbstore/src/main/java/org/apache/qpid/server/store/berkeleydb/StandardEnvironmentFacade.java new file mode 100644 index 0000000000..8117ca1a9a --- /dev/null +++ b/qpid/java/bdbstore/src/main/java/org/apache/qpid/server/store/berkeleydb/StandardEnvironmentFacade.java @@ -0,0 +1,228 @@ +/* + * + * Licensed to the Apache Software Foundation (ASF) under one + * or more contributor license agreements. See the NOTICE file + * distributed with this work for additional information + * regarding copyright ownership. The ASF licenses this file + * to you under the Apache License, Version 2.0 (the + * "License"); you may not use this file except in compliance + * with the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, + * software distributed under the License is distributed on an + * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY + * KIND, either express or implied. See the License for the + * specific language governing permissions and limitations + * under the License. + * + */ +package org.apache.qpid.server.store.berkeleydb; + +import java.io.File; +import java.util.HashMap; +import java.util.Map; + +import org.apache.log4j.Logger; + +import com.sleepycat.je.Database; +import com.sleepycat.je.DatabaseConfig; +import com.sleepycat.je.DatabaseException; +import com.sleepycat.je.Environment; +import com.sleepycat.je.EnvironmentConfig; + +public class StandardEnvironmentFacade implements EnvironmentFacade +{ + private static final Logger LOGGER = Logger.getLogger(StandardEnvironmentFacade.class); + public static final String TYPE = "BDB"; + + private final String _storePath; + private final Map<String, Database> _databases = new HashMap<String, Database>(); + + private Environment _environment; + + public StandardEnvironmentFacade(String storePath, Map<String, String> attributes) + { + _storePath = storePath; + + if (LOGGER.isInfoEnabled()) + { + LOGGER.info("Creating environment at environment path " + _storePath); + } + + File environmentPath = new File(storePath); + if (!environmentPath.exists()) + { + if (!environmentPath.mkdirs()) + { + throw new IllegalArgumentException("Environment path " + environmentPath + " could not be read or created. " + + "Ensure the path is correct and that the permissions are correct."); + } + } + + EnvironmentConfig envConfig = new EnvironmentConfig(); + envConfig.setAllowCreate(true); + envConfig.setTransactional(true); + + for (Map.Entry<String, String> configItem : attributes.entrySet()) + { + LOGGER.debug("Setting EnvironmentConfig key " + configItem.getKey() + " to '" + configItem.getValue() + "'"); + envConfig.setConfigParam(configItem.getKey(), configItem.getValue()); + } + + envConfig.setExceptionListener(new LoggingAsyncExceptionListener()); + + _environment = new Environment(environmentPath, envConfig); + } + + @Override + public void commit(com.sleepycat.je.Transaction tx) + { + try + { + tx.commitNoSync(); + } + catch (DatabaseException de) + { + LOGGER.error("Got DatabaseException on commit, closing environment", de); + + closeEnvironmentSafely(); + + throw handleDatabaseException("Got DatabaseException on commit", de); + } + } + + @Override + public void close() + { + closeDatabases(); + closeEnvironment(); + } + + private void closeDatabases() + { + RuntimeException firstThrownException = null; + for (Database database : _databases.values()) + { + try + { + database.close(); + } + catch(RuntimeException e) + { + if (firstThrownException == null) + { + firstThrownException = e; + } + } + } + if (firstThrownException != null) + { + throw firstThrownException; + } + } + + private void closeEnvironmentSafely() + { + if (_environment != null) + { + if (_environment.isValid()) + { + try + { + closeDatabases(); + } + catch(Exception e) + { + LOGGER.error("Exception closing environment databases", e); + } + } + try + { + _environment.close(); + } + catch (DatabaseException ex) + { + LOGGER.error("Exception closing store environment", ex); + } + catch (IllegalStateException ex) + { + LOGGER.error("Exception closing store environment", ex); + } + finally + { + _environment = null; + } + } + } + + @Override + public Environment getEnvironment() + { + return _environment; + } + + private void closeEnvironment() + { + if (_environment != null) + { + // Clean the log before closing. This makes sure it doesn't contain + // redundant data. Closing without doing this means the cleaner may + // not get a chance to finish. + try + { + _environment.cleanLog(); + } + finally + { + _environment.close(); + _environment = null; + } + } + } + + @Override + public DatabaseException handleDatabaseException(String contextMessage, DatabaseException e) + { + if (_environment != null && !_environment.isValid()) + { + closeEnvironmentSafely(); + } + return e; + } + + @Override + public void openDatabases(DatabaseConfig dbConfig, String... databaseNames) + { + for (String databaseName : databaseNames) + { + Database database = _environment.openDatabase(null, databaseName, dbConfig); + _databases .put(databaseName, database); + } + } + + @Override + public Database getOpenDatabase(String name) + { + Database database = _databases.get(name); + if (database == null) + { + throw new IllegalArgumentException("Database with name '" + name + "' has not been opened"); + } + return database; + } + + @Override + public Committer createCommitter(String name) + { + return new CoalescingCommiter(name, this); + } + + @Override + public String getStoreLocation() + { + return _storePath; + } + +} |