Custom Tomcat valves

NotificationPollingValveBase

Base valve class that support adding notifications to a queue to be emailed to a specified recipient after a given polling delay.

Attributes:
emailRecipient (String)
emailSender (String - defaults to emailRecipient)
emailSubject (String - defaults to 'Notification from CLASSNAME')
smtpHost (String)
pollingDelay (Long - 10 seconds default)

A JavaMail 1.5.5 implementation is repackaged with Jar Jar Links within the valves jar for sending emails.

StuckThreadNotificationValve

Modified version of org.apache.catalina.valves.StuckThreadDetectionValve - added support to send notifications (emails) about stuck threads.

See parent class specification for attributes and usage.

Example usage in hosts section in server.xml:

<Valve className="com.nortal.healthcare.tomcat.valves.StuckThreadNotificationValve" 
    threshold="600"
    pollingDelay="300"
    emailRecipient="example1@email.com" 
    emailSender="example2@email.com"
    emailSubject="Stuck thread in ENVIRONMENT"
    smtpHost="example.host" 
    />

ErrorReportNotificationValve

Modified version of org.apache.catalina.valves.ErrorReportValve that sends notifications (emails) about responses with a status code of 500 (internal server error)

Example usage in server.xml:
(need to override errorReportValveClass in default host element and also add a valve element)

<Host name="localhost"  appBase="webapps"
    errorReportValveClass="com.nortal.healthcare.tomcat.valves.ErrorReportNotificationValve"
    unpackWARs="true" autoDeploy="true">
    
    <Valve className="com.nortal.healthcare.tomcat.valves.ErrorReportNotificationValve" 
        pollingDelay="300"
        emailRecipient="example@email.com" 
        smtpHost="example.host" 
    />

Building and usage

Run the following command to build the jar with dependencies (your JAVA_HOME environment variable should point to JDK8):

• Ant: ant clean ivy jar
• Gradle: ./gradlew bundledJar

Copy the resulting jar from dist/ to $TOMCAT_HOME/lib/

Add the valves to your server.xml (see StuckThreadNotificationValve example above)