branch-1.2/contrib/ambari-log4j/src/main/java/org/apache/ambari/log4j/common/store/DatabaseStore.java

/**
 * 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.ambari.log4j.common.store;

import java.io.IOException;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;

import org.apache.ambari.log4j.common.LogStore;
import org.apache.ambari.log4j.common.LogStoreUpdateProvider;
import org.apache.log4j.spi.LoggingEvent;

public class DatabaseStore implements LogStore {

  final private String database;
  final private String user;
  final private String password;
  
  final private Connection connection;
  final private LogStoreUpdateProvider updateProvider;
  
  public DatabaseStore(String driver, 
      String database, String user, String password, 
      LogStoreUpdateProvider updateProvider) 
      throws IOException {
    try {
      Class.forName(driver);
    } catch (ClassNotFoundException e) {
      System.err.println("Can't load driver - " + driver);
      throw new RuntimeException("Can't load driver - " + driver);
    }
    this.database = database;
    this.user = (user == null) ? "" : user;
    this.password = (password == null) ? "" : password;
    try {
      this.connection = 
          DriverManager.getConnection(this.database, this.user, this.password);
    } catch (SQLException sqle) {
      throw new IOException("Can't connect to database " + this.database, sqle);
    }
    this.updateProvider = updateProvider;
    
    this.updateProvider.init(this.connection);
  }
  
  @Override
  public void persist(LoggingEvent originalEvent, Object parsedEvent)
      throws IOException {
    updateProvider.update(originalEvent, parsedEvent);
  }

  @Override
  public void close() throws IOException {
    try {
      connection.close();
    } catch (SQLException sqle) {
      throw new IOException(
          "Failed to close connectionto database " + this.database, sqle);
    }
  }
}