net.logstash.logback.appender.destination.DestinationParser Maven / Gradle / Ivy
/**
* Licensed 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 net.logstash.logback.appender.destination;
import java.net.InetSocketAddress;
import java.util.ArrayList;
import java.util.List;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import org.apache.commons.lang.StringUtils;
import org.apache.juli.logging.ch.qos.logback.core.CoreConstants;
/**
* Constructs {@link InetSocketAddress}es by parsing {@link String} values.
*/
public class DestinationParser {
private static final Pattern DESTINATION_PATTERN = Pattern.compile("^\\s*(\\S+?)\\s*(:\\s*(\\S+)\\s*)?$");
private static final int HOSTNAME_GROUP = 1;
private static final int PORT_GROUP = 3;
/**
* Constructs {@link InetSocketAddress}es by parsing the given {@link String} value.
*
* The string is a comma separated list of destinations in the form of hostName[:portNumber].
*
*
* For example, "host1.domain.com,host2.domain.com:5560"
*
*
* If portNumber is not provided, then the given defaultPort will be used.
*/
public static List parse(String destinations, int defaultPort) {
/*
* Multiple destinations can be specified on one single line, separated by comma
*/
String[] destinationStrings = StringUtils.split(StringUtils.trimToEmpty(destinations), ',');
List destinationList = new ArrayList(destinationStrings.length);
for (String entry: destinationStrings) {
/*
* For #134, check to ensure properties are defined when destinations
* are set using properties.
*/
if (entry.contains(CoreConstants.UNDEFINED_PROPERTY_SUFFIX)) {
throw new IllegalArgumentException("Invalid destination '" + entry + "': unparseable value (expected format 'host[:port]').");
}
Matcher matcher = DESTINATION_PATTERN.matcher(entry);
if (!matcher.matches()) {
throw new IllegalArgumentException("Invalid destination '" + entry + "': unparseable value (expected format 'host[:port]').");
}
String host = matcher.group(HOSTNAME_GROUP);
String portString = matcher.group(PORT_GROUP);
int port;
try {
port = (portString != null)
? Integer.parseInt(portString)
: defaultPort;
} catch (NumberFormatException e) {
throw new IllegalArgumentException("Invalid destination '" + entry + "': unparseable port (was '" + portString + "').");
}
destinationList.add(InetSocketAddress.createUnresolved(host, port));
}
return destinationList;
}
}