Scheduling Jobs
In the last chapter, you got your first real taste of using Quartz to schedule jobs. Admittedly, the jobs were not very complex, but that wasn't the point. You should have walked away with a fair understanding of how to construct and schedule jobs and, more important, a desire and excitement to learn more. That's where this chapter picks up.
Chapter 4 moves into the core of the Quartz framework. Arguably, this is the most important chapter for you to read and understand. The Scheduler is the heart of the framework. This chapter focuses on how to use the Scheduler to manage your jobs, how to create and associate triggers so the jobs will fire, and how to choose the calendar to provide more flexibility for a given schedule.
"For a moment, nothing happened. Then, after a second or so, nothing continued to happen."
Douglas Adams, Hitchhiker's Guide to the Galaxy
Scheduling in the Enterprise
- What Is Job Scheduling?
- Why job Scheduling Is Important
- Uses for Job Schedulers in the Enterprise
- Uses for Job Schedulers in NonEnterprise
- Job scheduling Versus Workflow
- What about Alternative Solutions?
Getting Started with Quartz
- Getting Started with Quartz
- History of the Quartz Framework
- Downloading and Installing Quartz
- Building Quartz from Source
- Getting Help from the Quartz Community
- Whos Using Quartz?
Hello, Quartz
- Hello, Quartz
- The Hello, World Quartz Project
- Scheduling the Quartz ScanDirectoryJob
- Scheduling a Quartz Job Declaratively
- Packaging the Quartz Application
Scheduling Jobs
- Scheduling Jobs
- The Quartz Scheduler
- The Quartz SchedulerFactory
- Managing the Scheduler
- Managing Jobs
- Volatility, Durability, and Recoverability
- Quick Java Thread Overview
- Thread Usage in Quartz
- Understanding Quartz Triggers
Cron Triggers and More
- Cron Triggers and More
- Quick Lesson in Cron
- Using the Quartz CronTrigger
- The Cron Expression Format
- Using Start and End Dates with CronTrigger
- Using TriggerUtils with the CronTrigger
- Using CronTriggers in the JobInitializationPlugin
- Cron Expressions Cookbook
- Creating a Fire-Now Trigger
JobStores and Persistence
- JobStores and Persistence
- Job Storage
- Job Storage in Quartz
- Using Memory to Store Scheduler Information
- Using Persistent JobStores
- Using the Database for Job Storage
- Creating the Quartz Database Structure
- Using JobStoreTX
- Configuring a DataSource for JobStoreTX
- Running Quartz with JobStoreTX
- Using Memory to Store Scheduler Information
- Using the JobStoreCMT
- Configuring Datasources for JobStoreCMT
- Improving Performance with Persistent JobStores
- Creating New JobStores
Implementing Quartz Listeners
- Implementing Quartz Listeners
- Listeners as Extension Points
- Implementing a Listener
- Listening for Job Events
- Listening for Trigger Events
- Listening for Scheduler Events
- Using the FileScanListener
- Implementing Listeners in the quartz_jobs.xml File
- Thread Use in Listeners
- Uses of the Quartz Listeners
Using Quartz Plug-Ins
- Using Quartz Plug-Ins
- What Is a Plug-In?
- Creating a Quartz Plug-In
- Registering Your Plug-Ins
- Using Multiple Plug-Ins
- Quartz Utility Plug-Ins
Using Quartz Remotely
- Using Quartz Remotely
- Why RMI with Quartz?
- Brief Overview of Java RMI
- Requirements of RMI
- Creating a Quartz RMI Server
- Using the RMI Registry
- Creating the RMI Client
- Testing the RMI Server and Client
Using Quartz with J2EE
- Using Quartz with J2EE
- If I Have J2EE, Why Do I Need Quartz?
- Using the J2EE Containers DataSource
- Using Other J2EE Resources
- The EJB 2.1 Specification: Finally Some Light
Clustering Quartz
- Clustering Quartz
- What Does Clustering Mean to Quartz?
- How Clustering Works in Quartz
- Configuring Quartz to Use Clustering
- Running the Quartz Cluster Nodes
- Quartz Clustering Cookbook
Quartz Cookbook
Quartz and Web Applications
- Quartz and Web Applications
- Using Quartz Within a Web Application
- Integrating Quartz
- Using Quartz with the Struts Framework
- The QuartzInitializerServlet to the Rescue
- Using a ServletContextListener
- Introducing the Quartz Web Application
Using Quartz with Workflow
- Using Quartz with Workflow
- What Is Workflow?
- Job Chaining in Quartz
- Quick Introduction to OSWorkflow
- Integration of Quartz with OSWorkflow
- Creating a Workflow Job
- Conclusion
Appendix A. Quartz Configuration Reference
- Appendix A. Quartz Configuration Reference
- The Main Quartz Properties
- Configuring the Quartz ThreadPool
- Configuring Quartz Listeners
- Configuring a TriggerListener
- Configuring Quartz Plug-Ins
- Configuring Quartz RMI Settings
- Configuring JobStore Settings
- Configuring the JobStoreTX JobStore
- Configuring JobStoreCMT
- Configuring Quartz Datasources
- Configuring a Datasource Using a Custom ConnectionProvider
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Pages: 148
- Step 1.1 Install OpenSSH to Replace the Remote Access Protocols with Encrypted Versions
- Step 1.2 Install SSH Windows Clients to Access Remote Machines Securely
- Step 2.1 Use the OpenSSH Tool Suite to Replace Clear-Text Programs
- Step 3.2 Use PuTTY / plink as a Command Line Replacement for telnet / rlogin
- Step 5.2 Troubleshooting Common OpenSSH Errors/Problems
