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Table of Contents

Introduction

JavaMonitor is a web-based tool used to configure and maintain deployed WebObjects applications. It is capable of handling multiple WebObjects applications, multiple instances of each application, and multiple WebObjects Applications Servers. In most cases you'll have one instance of JavaMonitor controlling all instances of your applications, even if they are spread across multiple Application Servers.

...

Apple released the original wotaskd and JavaMonitor to the community as open source in WebObjects 5.4. The source was then quickly modified and included in Project Wonder. Substantial improvements in both functionality and look-and-feel have been made over the years. These improved versions of wotaskd.woa and JavaMonitor.woa are available as standard Wonder applications.

Where To Get Them

You can either download them pre-built from Wonder's Hudson Jenkins build server or build them from the source code.

To build them from the Wonder source code, simply run the following command from the Wonder directory at the root of the Wonder source.

Code Block
ant frameworks deployment.tools -Dwonder.patch=54 -Ddeployment.standalone=true
Info
titleWhat this command does:
  • ant: calls Apache Ant. It is assumed that you have this already installed.
  • frameworks: tells Ant to build the "frameworks" target. This may not be needed if you already have Wonder built and installed in a location Ant can find automatically.
  • deployment.tools: tells Ant to build the "deployment.tools" target. This is the target that builds both wotaskd.woa and JavaMonitor.woa. You absolutely need this one.-Dwonder.patch=54: tells Wonder to build for WebObjects version 5.4. You need this if you are building against Wonder Trunk. Some branches don't need it, but it doesn't hurt either.
  • -Ddeployment.standalone=true: argument will embed the required Wonder and WebObjects frameworks in built applications. You need this to ensure that the required frameworks are embedded in the built applications.

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Bug Fixes to Apple's Versions

JavaMonitor

  • Fixes an issue with the Application Delete page
  • Selection in Application Detail page is now Ajax and is maintained

Improvements to Apple's versions

Automatic archive of SiteConfig.xml

On every change you make to an application's configuration, a backup of SiteConfig.xml will be created in, by default, /Library/WebObjects/Configuration.

Simplified/Automated Bouncing

In the "list instances" page, you get a "Bounce" action link. This action only work if you have at least one active instance and one inactive instance (only one inactive instance takes part in the bounce). What it does is :

  • Find the one inactive (eg : i.e., not started) instance and start it
  • Find the active instances (minus the one started in the previous step below) and enable "Refuse New Session"
  • Bounce Stop the active instances that are refusing new sessions when the minimum session count is reached
  • Restart all but one of the instances that were just stopped and turn on "Auto-Recover"

This feature, from Pascal's understanding, allows you to upload new versions of your application, start up the new version and refuse sessions for the instances running on the older version.  This is designed to work so that you always have just one inactive instance that is only used while the bounce is performed.  While waiting for the existing sessions to end you will have only one instance of your app accepting new sessions; you need to determine if this is acceptable for your app or not.

Warning
titleDatabase Changes

It is uncertain what will happen if the new version of your application makes changes to your database schema (e.g., uses ERXMigrations). The old instances may raise exceptions before they can gracefully shut down because the schema no longer matches what the old application's EOF expects. Try it out on a test server first and then update this page so everyone knows!

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note

Statistics

If you call No Format

nopaneltrue
http://monitorhost:port/cgi-bin/WebObjects/JavaMonitor.woa/wa/statistics, JavaMonitor will send you back statistics, in JSON serialized Property List format, about instances, per application.

Code Block
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titleStatistics Example Results
(
	{
		"configuredInstances" = "2";
		"maxSessions" = "0";
		"maxAvgIdleTime" = "2.078";
		"avgTransactions" = "44.0000";
		"sumSessions" = "0";
		"avgAvgTransactionTime" = "0.0985000";
		"refusingInstances" = "0";
		"avgSessions" = "0.0000";
		"maxTransactions" = "88";
		"applicationName" = "AjaxExample";
		"avgAvgIdleTime" = "1.0390000";
		"maxAvgTransactionTime" = "0.197";
		"runningInstances" = "2";
		"sumTransactions" = "88";
	},
	{
		"configuredInstances" = "2";
		"maxSessions" = "0";
		"maxAvgIdleTime" = "325.443";
		"avgTransactions" = "0.5000";
		"sumSessions" = "0";
		"avgAvgTransactionTime" = "0.00000";
		"refusingInstances" = "0";
		"avgSessions" = "0.0000";
		"maxTransactions" = "1";
		"applicationName" = "AjaxExample2";
		"avgAvgIdleTime" = "162.7215000";
		"maxAvgTransactionTime" = "0.0";
		"runningInstances" = "2";
		"sumTransactions" = "1";
	}
)
Info

If JavaMonitor is configured with a password, and I hope you do, pass pw=monitorpassword as a argument to the query :

Code Block

http://monitorhost:port/cgi-bin/WebObjects/JavaMonitor.woa/wa/statistics?pw=monitorpassword

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wget http://monitorhost:56789/cgi-bin/WebObjects/JavaMonitor.woa/admin/stop?type=app&name=InstanceName&pw=yourPassword

Direct Actions in JavaMonitor for Management Tasks

You can do most of the standard management tasks you'd normally do in Monitor JavaMonitor's web UI by calling direct actions. They are in a different query handler, /admin. They follow the same format and use the same query parameters. Those DA can be useful standard WebObjects Direct Actions. Instead of using the /wa/ request handler though, these management tasks use a new /admin/ request handler. These Direct Actions can be very useful, especially if you need to restart instances or other do tasks within ant from the command line, from within Ant or other build /deployment systems.?type=all : return details about all applications and instances
or deployment systems.

List of available direct actions :

  • info : Returns details (number of deaths, state, etc.), in JavaScript Object Notation (JSON) as specified
    info?type=all
    info?type=app&name=AppName
    info?type=ins&name=AppName-InstanceNumber
  • running : Returns YES if all of the specified are running, NO if not
    running?type=all
    running?type=app&name=AppName
    running?type=ins&name=AppName-InstanceNumber
  • stopped : Returns YES if all the specified is running, NO if not.
    stopped?type=all
    stopped?type=app&name=AppName
    stopped?type=ins&name=AppName-InstanceNumber
  • bounce : Returns OK after Bouncing (see description above) as specified
    bounce?type=all
    bounce?type=app&name=AppName
  • clearDeaths : Returns OK after clearing deaths as specified
    clearDeaths?type=all
    clearDeaths?type=app&name=AppName
  • turnScheduledOn : Returns OK after turning on scheduling as specified. Call /turnScheduledOff to do the opposite.
    turnScheduledOn?type=all
    turnScheduledOn?type=app&name=AppName
    turnScheduledOn?type=ins&name=AppName-InstanceNumber
  • turnRefuseNewSessionsOn : Returns OK after turning on "Refuse new sessions" as specified
    turnRefuseNewSessionsOn?type=all
    turnRefuseNewSessionsOn?type=app&name=AppName
    turnRefuseNewSessionsOn?type=ins&name=AppName-InstanceNumber
  • turnRefuseNewSessionsOff : Returns OK after turning off "Refuse new sessions" as specified
    turnRefuseNewSessionsOff?type=all
    turnRefuseNewSessionsOff?type=app&name=AppName
    turnRefuseNewSessionsOff?type=ins&name=AppName-InstanceNumber
  • turnAutoRecoverOn : Returns OK after turning on "Auto Recover" as specified
    turnAutoRecoverOn?type=all
    turnAutoRecoverOn?type=app&name=AppName

...


  • turnAutoRecoverOn?type=ins&name=AppName-InstanceNumber
  • turnAutoRecoverOff : Returns OK after turning off "Auto Recover" as specified
    turnAutoRecoverOn?type=all
    turnAutoRecoverOn?type=app&name=AppName
    turnAutoRecoverOn?type=ins&name=AppName-InstanceNumber
  • forceQuit : Returns OK after force quitting as specified. This could be useful to call from a monitoring system.
    forceQuit?type=all
    forceQuit?type=app&name=AppName
    forceQuit?type=ins&name=AppName-InstanceNumber

...

  • stop : Returns OK after calling "Stop" as specified
    stop?type=all
    stop?type=app&name=AppName
    stop?type=ins&name=AppName-

...

  • InstanceNumber
  • start : Returns OK after calling "Start" as specified
    start?type=all
    start?type=app&name=AppName
    start?type=ins&name=AppName-InstanceNumber

To get details about all instances and of all applications, you call :
http://hostnamemonitorhost:56789port/cgi-bin/WebObjects/JavaMonitor.woa/admin/info?type=all

To get details about the AjaxExample application:
http://hostnamemonitorhost:56789port/cgi-bin/WebObjects/JavaMonitor.woa/admin/info?type=app&name=AjaxExample

And for a specific instance To get details about instance 1 of the AjaxExample application:
http://hostnamemonitorhost:56789port/cgi-bin/WebObjects/JavaMonitor.woa/admin/info?type=ins&name=AjaxExample-1

The response for the direct actions will either send a JSON array or YES/NO. For example, the query info for all instances will return :

Code Block

[Hudson Build Server for Wonder|http://webobjects.mdimension.com/hudson/job/Wonder54/lastSuccessfulBuild/artifact/dist/]

List of available direct actions :

/info : return details (number of deaths, state, etc.; see above), in JSON, about an instance.
/running : return YES if the instance is running, NO if not.
/stopped : return NO if the instance is running, YES if not.
/bounce: more on it later.
/clearDeaths : clear the number of deaths (same action as clicking the "Clear deaths" in JavaMonitor)
/turnScheduledOn : turn scheduling on for an application or instance. Call /turnScheduledOff to do the opposite.
/turnRefuseNewSessionsOn : turn "Refuse new sessions" on, call turnRefuseNewSessionsOff to do the opposite.
/turnAutoRecoverOn : guess what? It activate "Auto recover"! And guess again? /turnAutoRecoverOff do the opposite!
/forceQuit : force quit an application, might be useful to call it from a monitoring system.
/stop : stop an application/instance the normal way.
/start : start an application/instance the normal way.

Remote Control via REST Routes

...

Remote Control via REST Routes (for JavaMonitor)

If the control offered by the Direct Actions isn't enough, JavaMonitor allows additional control via REST calls. Between the two methods (Direct Actions, REST) you have almost full remote-control of JavaMonitor. Just make sure that your JavaMonitor installation is secure! Just like with Direct Actions, you need to append ?pw=XXXX to the URLs if your JavaMonitor is password protected.

Examples of REST calls :

Code Block
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titleAdding a New Host

curl -X POST -d "{id: 'otherserver.com',type: 'MHost', osType: 'MACOSX',address: '192.168.20.5', name: 'otherserver.com'}" http://monitorhost:port/apps/WebObjects/JavaMonitor.woa/ra/mHosts.json
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titleFetching Details for All Applications

curl -X GET http://monitorhost:port/cgi-bin/WebObjects/JavaMonitor.woa/ra/mApplications.json
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titleAdding a New Application

curl -X POST -d "{id: 'AjaxExample',type: 'MApplication', name: 'AjaxExample',unixOutputPath: '/opt/Local/Library/WebObjects/Logs', unixPath: '/opt/Local/Library/WebObjects/Applications/AjaxExample.woa/AjaxExample'}" http://monitorhost:port/cgi-bin/WebObjects/JavaMonitor.woa/ra/mApplications.json
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titleDelete an Application

curl -X DELETE http://monitorhost:port/cgi-bin/WebObjects/JavaMonitor.woa/ra/mApplications/AjaxExample.json
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titleAdding a New Instance

curl -X GET http://monitorhost:port/cgi-bin/WebObjects/JavaMonitor.woa/ra/mApplications/AjaxExample/addInstance&host=localhost
Code Block
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titleDelete an Instance

curl -X GET http://monitorhost:port/cgi-bin/WebObjects/JavaMonitor.woa/ra/mApplications/AjaxExample/deleteInstance?id=1
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titleConfiguring the Site

curl -X PUT -d "{woAdaptor:'www.mydomain.com'}" http://monitorhost:port/cgi-bin/WebObjects/JavaMonitor.woa/ra/mSiteConfig.json

Note that before configuring the site you must first add a host. If you attempt to configure the site prior to adding a host you will get an InvalidStateException.

Remote Control via REST Routes (for wotaskd)

Starting on August 10th 2012, wotaskd also have REST routes. By using them, you can do most of the tasks using REST and you might not even need JavaMonitor. Just like the JavaMonitor REST and Direct Actions, you need to append ?pw=XXXX to the URLs if JavaMonitor wotaskd is password protected.

Examples of REST calls :

Fetching the details of all applications :

...

Code Block
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titleFetching Details for All Applications
curl -X GET http://127.0.0.1:56789wotaskdhost:port/cgi-bin/WebObjects/JavaMonitor.woa/ra/mApplications.json
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titleAdding a

...

code
New Application
curl -X POST -d "{id: 'AjaxExample',type: 'MApplication', name: 'AjaxExample',unixOutputPath: '/opt/Local/Library/WebObjects/Logs', unixPath: '/opt/Local/Library/WebObjects/Applications/AjaxExample.woa/AjaxExample'}" http://127.0.0.1:56789wotaskdhost:port/cgi-bin/WebObjects/JavaMonitor.woa/ra/mApplications.json
Code Block
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titleDelete an Application

curl -X DELETE http://wotaskdhost:port/cgi-bin/WebObjects/JavaMonitor.woa/ra/mApplications/AjaxExample.json
Code Block
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titleAdding a

...

code
New Instance
curl -X GET http://127.0.0.1:56789wotaskdhost:port/cgi-bin/WebObjects/JavaMonitor.woa/ra/mApplications/AjaxExample/addInstance&host=localhost
Code Block
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titleDelete an

...

code
Instance

curl -X GET http://wotaskdhost:port/cgi-bin/WebObjects/JavaMonitor.woa/ra/mApplications/AjaxExample/deleteInstance?id=1
Code Block
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titleConfiguring the Site
curl -X DELETE http://127.0.0.1:56789 PUT -d "{woAdaptor:'www.mydomain.com'}" http://wotaskdhost:port/cgi-bin/WebObjects/JavaMonitor.woa/ra/mSiteConfig.json
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titleStarting all applications

curl -X GET http://wotaskdhost:port/cgi-bin/WebObjects/JavaMonitor.woa/ra/mApplications/start
Code Block
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titleStarting a specific application (AjaxExample in this example)

curl -X GET http://wotaskdhost:port/cgi-bin/WebObjects/JavaMonitor.woa/ra/mApplications/AjaxExample.json

Delete an instance :

Code Block
/start
Code Block
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titleStarting a specific instance of an application (instance 1 of AjaxExample in this example)

curl -X GET http://wotaskdhost:port/cgi-bin/WebObjects/JavaMonitor.woa/ra/mApplications/AjaxExample/start?id=1
Code Block
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titleStopping all applications
curl -X GET http://127.0.0.1:56789wotaskdhost:port/cgi-bin/WebObjects/JavaMonitor.woa/ra/mApplications/stop
Code Block
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titleStopping a specific application (AjaxExample in this example)

curl -X GET http://wotaskdhost:port/cgi-bin/WebObjects/JavaMonitor.woa/ra/mApplications/AjaxExample/stop
Code Block
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titleStopping a specific instance of an application (instance 1 of AjaxExample in this example)

curl -X GET http://wotaskdhost:port/cgi-bin/WebObjects/JavaMonitor.woa/ra/mApplications/AjaxExample/deleteInstancestop?id=1
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titleForce quit all applications

curl -X GET http://wotaskdhost:port/cgi-bin/WebObjects/JavaMonitor.woa/ra/mApplications/forceQuit

Adding a new host :

code
Code Block
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titleForce quit a specific application (AjaxExample in this example)

curl -X GET http://wotaskdhost:port/cgi-bin/WebObjects/JavaMonitor.woa/ra/mApplications/AjaxExample/forceQuit
Code Block
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titleForce quit a specific instance of an application (instance 1 of AjaxExample in this example)
curl -X POST -d "{id: 'otherserver.com',type: 'MHost', osType: 'MACOSX',address: '192.168.20.5', name: 'otherserver.com'}" http://127.0.0.1:56789/apps GET http://wotaskdhost:port/cgi-bin/WebObjects/JavaMonitor.woa/ra/mApplications/AjaxExample/forceQuit?id=1
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titleInformation about all applications

curl -X GET http://wotaskdhost:port/cgi-bin/WebObjects/JavaMonitor.woa/ra/mApplications/info
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titleInformation about a specific application (AjaxExample in this example)

curl -X GET http://wotaskdhost:port/cgi-bin/WebObjects/JavaMonitor.woa/ra/mApplications/AjaxExample/info
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titleInformation about a specific instance of an application (instance 1 of AjaxExample in this example)

curl -X GET http://wotaskdhost:port/cgi-bin/WebObjects/JavaMonitor.woa/ra/mApplications/AjaxExample/info?id=1
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titleCheck if all applications are running

curl -X GET http://wotaskdhost:port/cgi-bin/WebObjects/JavaMonitor.woa/ra/mApplications/isRunning
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titleCheck if a specific application is running (AjaxExample in this example)

curl -X GET http://wotaskdhost:port/cgi-bin/WebObjects/JavaMonitor.woa/ra/mApplications/AjaxExample/isRunning
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titleCheck if a specific instance of an application is running (instance 1 of AjaxExample in this example)

curl -X GET http://wotaskdhost:port/cgi-bin/WebObjects/JavaMonitor.woa/ra/mApplications/AjaxExample/isRunning?id=1
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titleCheck if all applications are stopped

curl -X GET http://wotaskdhost:port/cgi-bin/WebObjects/JavaMonitor.woa/ra/mApplications/isStopped
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titleCheck if a specific application is stopped (AjaxExample in this example)

curl -X GET http://wotaskdhost:port/cgi-bin/WebObjects/JavaMonitor.woa/ra/mApplications/AjaxExample/isStopped
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titleCheck if a specific instance of an application is stopped (instance 1 of AjaxExample in this example)

curl -X GET http://wotaskdhost:port/cgi-bin/WebObjects/JavaMonitor.woa/ra/mHosts.json
/mApplications/AjaxExample/isStopped?id=1

Troubleshooting

If JavaMonitor won't start up check the troubleshooting deployment section. In particular pay attention to the WOTaskd Didn't Start Q&A.