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/*
* 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.logging.log4j.core.appender.db.jdbc;
import org.apache.logging.log4j.core.Filter;
import org.apache.logging.log4j.core.appender.AbstractAppender;
import org.apache.logging.log4j.core.appender.db.AbstractDatabaseAppender;
import org.apache.logging.log4j.core.config.plugins.Plugin;
import org.apache.logging.log4j.core.config.plugins.PluginAttribute;
import org.apache.logging.log4j.core.config.plugins.PluginElement;
import org.apache.logging.log4j.core.config.plugins.PluginFactory;
import org.apache.logging.log4j.core.util.Booleans;
/**
* This Appender writes logging events to a relational database using standard JDBC mechanisms. It takes a list of
* {@link ColumnConfig}s with which it determines how to save the event data into the appropriate columns in the table.
* A {@link ConnectionSource} plugin instance instructs the appender (and {@link JdbcDatabaseManager}) how to connect to
* the database. This appender can be reconfigured at run time.
*
* @see ColumnConfig
* @see ConnectionSource
*/
@Plugin(name = "JDBC", category = "Core", elementType = "appender", printObject = true)
public final class JdbcAppender extends AbstractDatabaseAppender {
private static final long serialVersionUID = 1L;
private final String description;
private JdbcAppender(final String name, final Filter filter, final boolean ignoreExceptions,
final JdbcDatabaseManager manager) {
super(name, filter, ignoreExceptions, manager);
this.description = this.getName() + "{ manager=" + this.getManager() + " }";
}
@Override
public String toString() {
return this.description;
}
/**
* Factory method for creating a JDBC appender within the plugin manager.
*
* @param name The name of the appender.
* @param ignore If {@code "true"} (default) exceptions encountered when appending events are logged; otherwise
* they are propagated to the caller.
* @param filter The filter, if any, to use.
* @param connectionSource The connections source from which database connections should be retrieved.
* @param bufferSize If an integer greater than 0, this causes the appender to buffer log events and flush whenever
* the buffer reaches this size.
* @param tableName The name of the database table to insert log events into.
* @param columnConfigs Information about the columns that log event data should be inserted into and how to insert
* that data.
* @return a new JDBC appender.
*/
@PluginFactory
public static JdbcAppender createAppender(
@PluginAttribute("name") final String name,
@PluginAttribute("ignoreExceptions") final String ignore,
@PluginElement("Filter") final Filter filter,
@PluginElement("ConnectionSource") final ConnectionSource connectionSource,
@PluginAttribute("bufferSize") final String bufferSize,
@PluginAttribute("tableName") final String tableName,
@PluginElement("ColumnConfigs") final ColumnConfig[] columnConfigs) {
final int bufferSizeInt = AbstractAppender.parseInt(bufferSize, 0);
final boolean ignoreExceptions = Booleans.parseBoolean(ignore, true);
final StringBuilder managerName = new StringBuilder("jdbcManager{ description=").append(name)
.append(", bufferSize=").append(bufferSizeInt).append(", connectionSource=")
.append(connectionSource.toString()).append(", tableName=").append(tableName).append(", columns=[ ");
int i = 0;
for (final ColumnConfig column : columnConfigs) {
if (i++ > 0) {
managerName.append(", ");
}
managerName.append(column.toString());
}
managerName.append(" ] }");
final JdbcDatabaseManager manager = JdbcDatabaseManager.getJDBCDatabaseManager(
managerName.toString(), bufferSizeInt, connectionSource, tableName, columnConfigs
);
if (manager == null) {
return null;
}
return new JdbcAppender(name, filter, ignoreExceptions, manager);
}
}
