package com.mycompany.listeners;
import java.io.ByteArrayOutputStream;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.Enumeration;
import java.util.Properties;
import java.util.StringTokenizer;
import javax.mail.Session;
import javax.mail.Transport;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeMessage;
import com.puppycrawl.tools.checkstyle.DefaultLogger;
import com.puppycrawl.tools.checkstyle.api.AuditEvent;
import com.puppycrawl.tools.checkstyle.api.AuditListener;
import com.puppycrawl.tools.checkstyle.api.CheckstyleException;
import com.puppycrawl.tools.checkstyle.api.SeverityLevel;
/**
* Buffers log messages from DefaultLogger, and sends an e-mail with the
* results. The following Project properties are used to send the mail.
* <ul>
* <li> MailLogger.mailhost [default: localhost] - Mail server to use</li>
*
* <li> MailLogger.from [required] - Mail "from" address</li>
* <li> MailLlistener.failure.notify [default: true] - Send build failure
* e-mails?</li>
* <li> MailLogger.success.notify [default: true] - Send build success
* e-mails?</li>
* <li> MailLogger.failure.to [required if failure mail to be sent] - Address
* to send failure messages to</li>
* <li> MailLogger.success.to [required if success mail to be sent] - Address
* to send success messages to</li>
* <li> MailLogger.failure.subject [default: "Build Failure"] - Subject of
* failed build</li>
* <li> MailLlistener.success.subject [default: "Build Success"] - Subject of
* successful build</li>
* </ul>
* These properties are set using standard property setting mechanisms
* (command-line -D, ant <property>, etc).Properties can be overridden
* by specifying the filename of a properties file in the <i>
* MailLogger.properties.file property</i> . Any properties defined in that
* file will override properties.
* Based on
* <a href="http://ant.apache.org/index.html">org.apache.tools.ant.listener.MailLogger>org.apache.tools.ant.listener.MailLogger</a>
* @author Erik Hatcher
* <a href="mailto:ehatcher@apache.org">ehatcher@apache.org</a>
* @author Rick Giles
*/
public class MailLogger
implements AuditListener
{
/** output stream for logger */
private ByteArrayOutputStream mOutputStream;
/** adapted listener */
private DefaultLogger mLogger;
/** count of the number of errors and exceptions */
private int mErrors;
/**
* Constructs a <code>MailLogger</code>
*/
public MailLogger()
{
mOutputStream = new ByteArrayOutputStream();
mLogger = new DefaultLogger(mOutputStream, false);
mErrors = 0;
}
/** @see com.puppycrawl.tools.checkstyle.api.AuditListener */
public void auditStarted(AuditEvent aEvt)
{
mLogger.auditStarted(aEvt);
}
/**
* Sends an e-mail with the log results.
* @see com.puppycrawl.tools.checkstyle.api.AuditListener
*/
public void auditFinished(AuditEvent aEvt)
{
mLogger.auditFinished(aEvt);
final Properties properties = System.getProperties();
// overlay specified properties file (if any), which overrides project
// settings
final Properties fileProperties = new Properties();
final String filename =
(String) properties.get("MailLogger.properties.file");
if (filename != null) {
InputStream is = null;
try {
is = new FileInputStream(filename);
fileProperties.load(is);
}
catch (IOException ioe) {
// ignore because properties file is not required
;
}
finally {
if (is != null) {
try {
is.close();
}
catch (IOException e) {
;
}
}
}
}
for (Enumeration e = fileProperties.keys(); e.hasMoreElements();) {
final String key = (String) e.nextElement();
final String value = fileProperties.getProperty(key);
properties.put(key, value);
}
final boolean success = (mErrors == 0);
final String prefix = success ? "success" : "failure";
try {
final String mailhost =
getValue(properties, "mailhost", "localhost");
final String from = getValue(properties, "from", null);
final String toList = getValue(properties, prefix + ".to", null);
final String subject = getValue(properties, prefix + ".subject",
(success)
? "Checkstyle Audit Success"
: "Checkstyle Audit Failure");
sendMail(mailhost, from, toList, subject, mOutputStream.toString());
}
catch (Exception e) {
System.out.println("MailLogger failed to send e-mail!");
e.printStackTrace(System.err);
}
}
/** @see com.puppycrawl.tools.checkstyle.api.AuditListener */
public void fileStarted(AuditEvent aEvt)
{
mLogger.fileStarted(aEvt);
}
/** @see com.puppycrawl.tools.checkstyle.api.AuditListener */
public void fileFinished(AuditEvent aEvt)
{
mLogger.fileFinished(aEvt);
}
/** @see com.puppycrawl.tools.checkstyle.api.AuditListener */
public void addError(AuditEvent aEvt)
{
if (SeverityLevel.ERROR.equals(aEvt.getSeverityLevel())) {
mLogger.addError(aEvt);
mErrors++;
}
}
/** @see com.puppycrawl.tools.checkstyle.api.AuditListener */
public void addException(AuditEvent aEvt, Throwable aThrowable)
{
mLogger.addException(aEvt, aThrowable);
mErrors++;
}
/**
* Gets the value of a property.
*
* @param aProperties Properties to obtain value from.
* @param aName suffix of property name. "MailLogger." will be
* prepended internally.
* @param aDefaultValue value returned if not present in the properties.
* Set to null to make required.
* @return The value of the property, or default value.
* @throws CheckstyleException if no default value is specified and the
* property is not present in properties.
*/
private String getValue(Properties aProperties, String aName,
String aDefaultValue) throws CheckstyleException
{
final String propertyName = "MailLogger." + aName;
String value = (String) aProperties.get(propertyName);
if (value == null) {
value = aDefaultValue;
}
if (value == null) {
throw new CheckstyleException(
"Missing required parameter: " + propertyName);
}
return value;
}
/**
* Send the mail
*
* @param aMailhost mail server
* @param aFrom from address
* @param aToList comma-separated recipient list
* @param aSubject mail subject
* @param aText mail body
* @throws Exception if sending message fails
*/
private void sendMail(String aMailhost, String aFrom, String aToList,
String aSubject, String aText)
throws Exception
{
// Get system properties
final Properties props = System.getProperties();
// Setup mail server
props.put("mail.smtp.host", aMailhost);
// Get session
final Session session = Session.getDefaultInstance(props, null);
// Define message
final MimeMessage message = new MimeMessage(session);
message.setFrom(new InternetAddress(aFrom));
final StringTokenizer t = new StringTokenizer(aToList, ", ", false);
while (t.hasMoreTokens()) {
message.addRecipient(
MimeMessage.RecipientType.TO,
new InternetAddress(t.nextToken()));
}
message.setSubject(aSubject);
message.setText(aText);
Transport.send(message);
}
}