/*
* 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.synapse.format.syslog;
import java.io.IOException;
import java.io.InputStream;
import org.apache.axiom.om.OMElement;
import org.apache.axiom.om.OMFactory;
import org.apache.axiom.om.impl.llom.factory.OMLinkedListImplFactory;
import org.apache.axis2.AxisFault;
import org.apache.axis2.builder.Builder;
import org.apache.axis2.context.MessageContext;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
/**
* Message builder for syslog events.
* <p>
* See {@link org.apache.synapse.format.syslog} for a description of how to use
* this class.
*/
public class SyslogMessageBuilder implements Builder {
private static final Log log = LogFactory.getLog(SyslogMessageBuilder.class);
private static final String[] facilityNames = {
"kern", "user", "mail", "daemon", "auth", "syslog", "lpr", "news", "uucp", "cron",
"authpriv", "ftp", "reserved0", "reserved1", "reserved2", "reserved3",
"local0", "local1", "local2", "local3", "local4", "local5", "local6", "local7"
};
private static final String[] severityNames = {
"emerg", "alert", "crit", "err", "warning", "notice", "info", "debug"
};
public OMElement processDocument(InputStream inputStream,
String contentType, MessageContext messageContext) throws AxisFault {
String facility = null;
String severity = null;
String tag = null;
int pid = -1;
String content = null;
InputStreamConsumer in = new InputStreamConsumer(inputStream);
try {
StringBuilder buffer = new StringBuilder();
in.consume('<');
int priority = in.getInteger(3);
if (priority > 199) {
throw new ProtocolException("Invalid priority value (greater than 199)");
}
in.consume('>');
severity = severityNames[priority & 7];
facility = facilityNames[priority >> 3];
int savedPosition = in.getPosition();
try {
outer: while (true) {
int next = in.next();
switch (next) {
case '[':
in.consume();
pid = in.getInteger(6);
in.consume(']');
in.expect(':');
// Fall through
case ':':
in.consume();
in.consume(' ');
tag = buffer.toString();
break outer;
case ' ':
case -1:
throw new ProtocolException("Unexpected end of tag");
default:
in.consume();
buffer.append((char)next);
}
}
}
catch (ProtocolException ex) {
in.setPosition(savedPosition);
}
buffer.setLength(0);
while (true) {
int next = in.next();
if (next == '\n') {
in.consume();
in.consume(-1);
// Fall through
} else if (next == -1) {
content = buffer.toString();
break;
} else {
in.consume();
buffer.append((char)next);
}
}
}
catch (ProtocolException ex) {
log.error("Protocol error: " + ex.getMessage() + " [pri=" + facility + "." +
severity + " tag=" + tag + " pid=" + pid + "]");
throw new AxisFault("Protocol error", ex);
}
catch (IOException ex) {
throw new AxisFault("I/O error", ex);
}
OMFactory factory = new OMLinkedListImplFactory();
OMElement message = factory.createOMElement(SyslogConstants.MESSAGE);
message.addAttribute(factory.createOMAttribute(SyslogConstants.FACILITY, null, facility));
message.addAttribute(factory.createOMAttribute(SyslogConstants.SEVERITY, null, severity));
if (tag != null) {
message.addAttribute(factory.createOMAttribute(SyslogConstants.TAG, null, tag));
}
if (pid != -1) {
message.addAttribute(factory.createOMAttribute(SyslogConstants.PID, null, String.valueOf(pid)));
}
message.setText(content);
return message;
}
}