Channel Component Configuration File Channel EPN Assembly File
10.1 Overview of Oracle CQL Processor Configuration
An Oracle CEP application contains one or more complex event processors, or processors for short. Each processor takes as input events from one or more adapters; these adapters in turn listen to data feeds that send a continuous stream of data from a source. The source could be anything, from a financial data feed to the Oracle CEP load generator. The main feature of an Oracle CQL processor is its associated Oracle Continuous Query Language Oracle CQL rules that select a subset of the incoming events to then pass on to the component that is listening to the processor. The listening component could be another processor, or the business object POJO that typically defines the end of the event processing network, and thus does something with the events, such as publish them to a client application. For more information on Oracle CQL, see the Oracle Complex Event Processing CQL Language Reference. For each Oracle CQL processor in your application, you must create a processor element in a component configuration file. In this processor element you specify the initial set of Oracle CQL rules of the processor and any optional processor configuration. You can configure additional optional Oracle CQL processor features in the Oracle CQL processor EPN assembly file. The component configuration file processor element’s name element must match the EPN assembly file processor element’s id attribute. For example, given the EPN assembly file processor element shown in Example 10–1 , the corresponding component configuration file processor element is shown in Example 10–2 . Note: Oracle CQL replaces Event Processing Language EPL in Oracle CEP 11g Release 1 11.1.1. Oracle CEP supports EPL for backwards compatibility. For more information, see Chapter 11, Configuring EPL Processors . 10-2 Oracle Complex Event Processing Developers Guide Example 10–1 EPN Assembly File Oracle CQL Processor Id: proc wlevs:processor id=proc wlevs:table-source ref=Stock wlevs:processor Example 10–2 Component Configuration File Oracle CQL Processor Name: proc processor nameprocname rules query id=q1[CDATA[ SELECT ExchangeStream.symbol, ExchangeStream.price, Stock.exchange FROM ExchangeStream [Now], Stock WHERE ExchangeStream.symbol = Stock.symbol ]]query rules procesor You can create a processor element in any of the following component configuration files: ■ The default Oracle CEP application configuration file by default, META-INFwlevsconfig.xml. ■ A separate configuration file. If your application has more than one processor, you can create a processor element for each of them in the default config.xml file, you can create separate XML files in META-INFwlevs for each, or create a single XML file in META-INFwlevs that contains the configuration for all processors, or even all components of your application adapters, processors, and channels. Choose the method that best suits your development environment. By default, Oracle CEP IDE for Eclipse creates one component configuration file and one EPN assembly file. When you create an Oracle CQL processor using Oracle CEP IDE for Eclipse, by default, the processor element is added to the default component configuration file META-INFwlevsconfig.xml file. Using Oracle CEP IDE for Eclipse, you can choose to create a new configuration file or use an existing configuration file at the time you create the Oracle CQL processor. Component configuration files are deployed as part of the Oracle CEP application bundle. You can later update this configuration at runtime using Oracle CEP Visualizer, the wlevs.Admin utility, or manipulating the appropriate JMX Mbeans directly. For more information, see: ■ Section 1.1.5, Component Configuration Files ■ Section 1.1.4, EPN Assembly File ■ Section 4.3, Creating EPN Assembly Files ■ Oracle Complex Event Processing Visualizer Users Guide ■ wlevs.Admin Command-Line Reference in the Oracle Complex Event Processing Administrators Guide ■ Configuring JMX for Oracle CEP in the Oracle Complex Event Processing Administrators Guide For more information on Oracle CQL processor configuration, see: ■ Section 10.1.1, Controlling Which Queries Output to a Downstream Channel Configuring Oracle CQL Processors 10-3 ■ Section 10.2, Configuring an Oracle CQL Processor ■ Section 10.3, Configuring an Oracle CQL Processor Table Source ■ Section 10.4, Configuring an Oracle CQL Processor Cache Source ■ Section 10.5, Example Oracle CQL Processor Configuration Files10.1.1 Controlling Which Queries Output to a Downstream Channel
If you configure an Oracle CQL processor with more than one query, by default, all queries output their results to the downstream channel. You can control which queries may output their results to a downstream channel using the channel selector element to specify a space delimited list of query names that may output their results on this channel. You may configure a channel element with a selector before creating the queries in the upstream processor. In this case, you must specify query names that match the names in the selector. For more information, see Section 9.1.5, Controlling Which Queries Output to a Downstream Channel: selector .10.2 Configuring an Oracle CQL Processor
You can configure a processor manually or by using the Oracle CEP IDE for Eclipse. See Section B.2, Component Configuration Schema wlevs_application_config.xsd for the complete XSD Schema that describes the processor component configuration file. See Section 10.5, Example Oracle CQL Processor Configuration Files for a complete example of an Oracle CQL processor component configuration file and assembly file. This section describes the following topics: ■ Section 10.2.1, How to Configure an Oracle CQL Processor Using Oracle CEP IDE for Eclipse ■ Section 10.2.2, How to Create an Oracle CQL Processor Component Configuration File Manually10.2.1 How to Configure an Oracle CQL Processor Using Oracle CEP IDE for Eclipse
The most efficient and least error-prone way to create and edit a processor is to use the Oracle CEP IDE for Eclipse. Optionally, you can create and edit a processor manually see Section 10.2.2, How to Create an Oracle CQL Processor Component Configuration File Manually . To configure an Oracle CQL processor using Oracle CEP IDE for Eclipse: 1. Use Oracle CEP IDE for Eclipse to create a processor. See Section 6.4.1.3, How to Create a Processor Node . When you use the EPN editor to create an Oracle CQL processor, Oracle CEP IDE for Eclipse prompts you to choose either the default component configuration file or a new component configuration file. For more information, see Chapter 6, Oracle CEP IDE for Eclipse and the Event Processing Network .2. Right-click the processor node and select Go to Configuration Source.
10-4 Oracle Complex Event Processing Developers Guide Oracle CEP IDE for Eclipse opens the appropriate component configuration file. The default processor component configuration is shown in Example 10–3 . The default processor component configuration includes a name element and rules element. Use the rules element to group the child elements you create to contain the Oracle CQL statements this processor executes, including: ■ rule: contains Oracle CQL statements that register or create user-defined windows. The rule element id attribute must match the name of the window. ■ view: contains Oracle CQL view statements the Oracle CQL equivalent of subqueries. The view element id attribute defines the name of the view. ■ query: contains Oracle CQL select statements. The query element id attribute defines the name of the query. The default processor component configuration includes a dummy query element with id Query. Example 10–3 Default Processor Component Configuration processor nameprocname rules query id=Query-- [CDATA[ select from MyChannel [now] ]] -- query rules processor 3. Replace the dummy query element with the rule, view, and query elements you create to contain the Oracle CQL statements this processor executes. For more information, see Introduction to Oracle CQL Queries, Views, and Joins in the Oracle Complex Event Processing CQL Language Reference.4. Select File Save.
5. Optionally, configure additional Oracle CQL processor features in the assembly file: ■ Section 10.1.1, Controlling Which Queries Output to a Downstream Channel ■ Section 10.3, Configuring an Oracle CQL Processor Table Source ■ Section 10.4, Configuring an Oracle CQL Processor Cache Source10.2.2 How to Create an Oracle CQL Processor Component Configuration File Manually
Although the most efficient and least error-prone way to create and edit a processor configuration is to use the Oracle CEP IDE for Eclipse see Section 10.2.1, How to Configure an Oracle CQL Processor Using Oracle CEP IDE for Eclipse , alternatively, you can also create and maintain a processor configuration file manually. This section describes the main steps to create the processor configuration file manually. For simplicity, it is assumed in the procedure that you are going to configure all processors in a single XML file, although you can also create separate files for each processor.Parts
» Oracle Fusion Middleware Online Documentation Library
» Adapter Components of the Oracle CEP Event Processing Network
» Channel Processor Components of the Oracle CEP Event Processing Network
» Event Bean Components of the Oracle CEP Event Processing Network
» Spring Bean Cache Components of the Oracle CEP Event Processing Network
» Table Nested Stages Components of the Oracle CEP Event Processing Network
» Foreign Stages Components of the Oracle CEP Event Processing Network
» Streams and Relations Transmitting Events in the EPN: Stream and Relation Sources and Sinks
» Transmitting Events in the EPN: Examples
» EPN Assembly File Overview of the Oracle CEP Programming Model
» Component Configuration Files Overview of the Oracle CEP Programming Model
» High Availability and Scalability
» Oracle CEP calls the ResumableBean.beforeResume method on all
» For each bean that implements RunnableBean, Oracle CEP starts it running in a
» Application state is now RUNNING.
» User Action: Uninstall Application
» User Action: Update Application
» User Action: Calling Methods of Stream and Relation Sources and Sinks
» Oracle CEP APIs Overview of the Oracle CEP Programming Model
» Creating an Oracle CEP Application
» Static Resource Names Static Resource Injection
» Dynamic Resource Names Static Resource Injection
» Dynamic Resource Injection Dynamic Resource Lookup Using JNDI
» Next Steps Oracle Fusion Middleware Online Documentation Library
» Event Type Instantiation and Immutability
» Event Types Specified as JavaBean or Java Class
» Event Types Specified as java.util.Map Event Types Specified as a Tuple
» Event Types for use With a Database Table Source
» Event Types for use With the csvgen Adapter
» Event Type and Serialization Creating Oracle CEP Event Types
» How to Create an Oracle CEP Event Type as a JavaBean Using the Event Type Repository Editor
» How to Create an Oracle CEP Event Type as a JavaBean Manually
» How to Create an Oracle CEP Event Type as a Tuple Using the Event Type Repository Editor
» How to Create an Oracle CEP Event Type as a Tuple Manually
» How to Create an Oracle CEP Event Type as a Java Class Manually
» How to Create an Oracle CEP Event Type as a java.util.Map
» Using an Event Type Builder Factory
» Sharing Event Types Between Application Bundles
» Installing the Latest Oracle CEP IDE for Eclipse
» Installing the Oracle CEP IDE for Eclipse Distributed With Oracle CEP
» Configuring Eclipse Oracle Fusion Middleware Online Documentation Library
» How to Create an Oracle CEP Project
» Oracle CEP Project Overview Select File New Other.
» How to Export an Oracle CEP Project
» In the Binary Build area, check the resources you want exported with your
» How to Add a Standard JAR File to an Oracle CEP Project
» How to Export a Package How to Import a Package
» How to Create a Remote Oracle CEP Server and Server Runtime
» How to Create an Oracle CEP Server Runtime
» How to Start a Local Oracle CEP Server
» How to Deploy an Application to an Oracle CEP Server
» How to Configure Connection and Control Settings for Oracle CEP Server
» How to Configure Domain Runtime Settings for Oracle CEP Server
» How to Start the Oracle CEP Visualizer from Oracle CEP IDE for Eclipse
» Right-click a server in the Servers view and select Debug.
» How to Open the EPN Editor from a Project Folder
» How to Open the EPN Editor from a Context or Configuration File
» Flow Representation Filtering EPN Editor Overview
» Zooming Layout Showing and Hiding Unconnected Beans
» Printing and Exporting to an Image Configuration Badging
» Link Specification Location Indicator
» Nested Stages EPN Editor Overview
» Event Type Repository Editor
» Hyperlinking in Component Configuration and EPN Assembly Files
» Hyperlinking in Oracle CQL Statements
» Type the keyboard short cut Ctrl-Alt-T.
» Right-click on an empty portion of the EPN Editor surface and select New from
» Laying Out Nodes Renaming Nodes Deleting Nodes
» Conversion Between JMS Messages and Event Types
» JMS Service Providers Outbound JMS Adapter
» How to Configure a JMS Adapter Using the Oracle CEP IDE for Eclipse
» How to Configure a JMS Adapter Manually
» How to Configure a JMS Adapter for Oracle WebLogic Server JMS Manually
» How to Configure a JMS Adapter for Tibco EMS JMS Manually
» How to Create a Custom Converter for the Inbound JMS Adapter
» How to Create a Custom Converter for the Outbound JMS Adapter
» How to Encrypt Passwords in the JMS Adapter Component Configuration File
» JMS Inbound Adapter EPN Assembly File Configuration
» JMS Outbound Adapter EPN Assembly File Configuration
» JMS Inbound Adapter Component Configuration
» JMS Outbound Adapter Component Configuration
» Local Publishing Overview of the Built-In Pub-Sub Adapter for Publishing
» Remote Publishing Overview of the Built-In Pub-Sub Adapter for Publishing
» Overview of the Built-In Pub-Sub Adapter for Subscribing
» Converting Between JSON Messages and Event Types
» How to Configure an HTTP Pub-Sub Adapter Using the Oracle CEP IDE for Eclipse
» How to Configure an HTTP Pub-Sub Adapter Manually
» HTTP Pub-Sub Adapter for Publising EPN Assembly File Configuration
» HTTP Pub-Sub Adapter for Subscribing EPN Assembly File Configuration
» HTTP Pub-Sub Adapter for Publising Component Configuration
» HTTP Pub-Sub Adapter for Subscribing Component Configuration
» Channels as Streams Channels Representing Streams and Relations
» Channels as Relations Channels Representing Streams and Relations
» System-Timestamped Channels Application-Timestamped Channels
» Controlling Which Queries Output to a Downstream Channel: selector
» Batch Processing Channels Overview of Channel Configuration
» EventPartitioner Channels Overview of Channel Configuration
» How to Configure a System-Timestamped Channel Using Oracle CEP IDE for Eclipse
» How to Configure an Application-Timestamped Channel Using Oracle CEP IDE for Eclipse
» How to Create a Channel Component Configuration File Manually
» Channel Component Configuration File Channel EPN Assembly File
» How to Configure an Oracle CQL Processor Using Oracle CEP IDE for Eclipse
» How to Create an Oracle CQL Processor Component Configuration File Manually
» How to Configure an Oracle CQL Processor Table Source Using Oracle CEP IDE for Eclipse
» Oracle CQL Processor Component Configuration File
» Oracle CQL Processor EPN Assembly File
» Configuring an Oracle CQL Processor Cache Source Overview of EPL Processor Component Configuration
» How to Configure an EPL Processor Manually
» Configuring an EPL Processor Cache Source
» EPL Processor Component Configuration File
» EPL Processor EPN Assembly File
» Use Case: Publishing Events to a Cache
» Use Case: Consuming Data From a Cache
» Use Case: Updating and Deleting Data in a Cache
» Use Case: Using a Cache in a Multi-Server Domain
» Additional Caching Features Overview of Oracle CEP Cache Configuration
» Caching APIs Overview of Oracle CEP Cache Configuration
» Specifying the Key Used to Index an Oracle CEP Local Cache
» Configuring an Oracle CEP Local Cache as an Event Source
» Configuring an Oracle CEP Local Cache Loader
» Configuring an Oracle CEP Local Cache Store
» The coherence-cache-config.xml File
» The tangosol-coherence-override.xml File
» Specifying the Key Used to Index an Oracle Coherence Cache
» Configuring an Oracle Coherence Cache as an Event Source
» Configuring an Oracle Coherence Cache Loader
» Configuring an Oracle Coherence Cache Store
» Configuring a Third-Party Caching System and Cache
» How to Access a Cache From an Oracle CQL Statement
» How To Access a Cache From an EPL Statement
» Accessing a Cache From an Adapter
» How to Access a Cache With JMX Using Oracle CEP Visualizer
» How to Access a Cache With JMX Using Java
» Default Persistent Event Store
» Custom Persistent Event Store
» Persistent Event Store Schema
» Querying Stored Events Overview of Configuring Event Record and Playback
» Configuring an Event Store for Oracle CEP Server
» Configuring a Component to Record Events
» Configuring a Component to Playback Events
» Starting and Stopping the Record and Playback of Events
» Description of the Berkeley Database Schema
» Accessing a Cache From an EPL User-Defined Function Creating a Custom Event Store Provider
» Custom Adapters as Event Sources Custom Adapters as Event Sinks
» How to Implement a Custom Adapter Using Ant
» Implementing a Custom Adapter as an Event Source
» Implementing a Custom Adapter as an Event Sink
» Implementing a Custom Adapter Factory
» How to Pass Static Login Credentials to the Data Feed Provider
» How to Pass Dynamic Login Credentials to the Data Feed Provider
» Configuring the Custom Adapter Component Configuration File
» Custom Event Beans as Event Sources
» Custom Event Beans as Event Sinks
» Implementing a Custom Event Bean as an Event Source
» Implementing a Custom Event Bean as an Event Sink
» Configuring the Custom Event Bean Component Configuration File
» Implementing a Custom Spring Bean as an Event Source
» Implementing a Custom Spring Bean as an Event Sink
» Declaring the Custom Spring Bean Components in your Application
» How to Expose an Oracle CEP Application as a Web Service
» How to Configure Oracle JDBC Data Cartridge Application Context
» Extending Component Configuration Using Annotations
» Extending Component Configuration Using an XSD
» How to Extend Component Configuration Using Annotations
» Creating the XSD Schema File
» Lifecycle Callback Annotations Lifecycle
» Rejoining the High Availability Multi-Server Domain
» Deployment Group and Notification Group
» High Availability Input Adapter
» Buffering Output Adapter High Availability Components
» Broadcast Output Adapter High Availability Components
» Correlating Output Adapter ActiveActiveGroupBean
» High Availability and Oracle Coherence
» Simple Failover Choosing a Quality of Service
» Simple Failover with Buffering
» Light-Weight Queue Trimming Choosing a Quality of Service
» Primary Oracle CEP High Availability Use Case
» Select the Minimum High Availability Your Application can Tolerate
» Use Oracle CEP High Availability Components at All Ingress and Egress Points
» Choose an Adequate warm-up-window Time Ensure Applications are Idempotent
» Source Event Identity Externally Understand the Importance of Event Ordering
» Range-Based Windows Oracle CQL Query Restrictions
» Tuple-Based Windows Oracle CQL Query Restrictions
» Partitioned Windows Oracle CQL Query Restrictions
» Sliding Windows Oracle CQL Query Restrictions
» DURATION Clause and Non-Event Detection
» Prefer Application Time Oracle CQL Query Restrictions
» How to Configure Simple Failover
» How to Configure Simple Failover With Buffering
» How to Configure Light-Weight Queue Trimming
» How to Configure Precise Recovery With JMS
» High Availability Input Adapter EPN Assembly File Configuration
» High Availability Input Adapter Component Configuration File Configuration
» Broadcast Output Adapter EPN Assembly File Configuration
» Broadcast Output Adapter Component Configuration File Configuration
» Correlating Output Adapter EPN Assembly File Configuration
» Correlating Output Adapter Component Configuration File Configuration
» How to Configure Scalability With the Default Channel EventPartitioner
» How to Configure Scalability With a Custom Channel EventPartitioner
» How to Configure Scalability in a JMS Application Without Oracle CEP High Availability
» How to Configure Scalability in a JMS Application With Oracle CEP High Availability
» How to Configure the ActiveActiveGroupBean Group Pattern Match
» Applications Overview of Application Assembly and Deployment
» Private Application Dependencies Application Dependencies
» Shared Application Dependencies Application Dependencies
» Library Directory Application Libraries
» Library Extensions Directory Application Libraries
» Creating Application Libraries Application Libraries
» Deployment and Deployment Order
» Configuration History Management Overview of Application Assembly and Deployment
» Assembling an Oracle CEP Application Using Oracle CEP IDE for Eclipse
» Creating the MANIFEST.MF File
» Assembling Applications With Foreign Stages
» How to Assemble a Custom Adapter in its Own Bundle
» How to Assemble a Custom Event Bean in its Own Bundle
» Click OK. How to Configure an Absolute Path
» How to Update an Application Library Using Oracle CEP IDE for Eclipse
» How to View an Application Library Using the Oracle CEP Visualizer
» Message Catalog Hierarchy Using Message Catalogs With Oracle CEP Server
» Guidelines for Naming Message Catalogs
» Using Message Arguments Using Message Catalogs With Oracle CEP Server
» Message Catalog Formats Using Message Catalogs With Oracle CEP Server
» Message Catalog Localization Using Message Catalogs With Oracle CEP Server
» How to Parse a Message Catalog to Generate Logger and TextFormatter Classes for Localization
» How to Deploy an Oracle CEP Application Using Oracle CEP IDE for Eclipse
» How to Deploy an Oracle CEP Application Using Oracle CEP Visualizer
» How to Deploy an Oracle CEP Application Using the Deployer Utility
» Overview of Testing Applications With the Load Generator and csvgen Adapter
» Configuring and Running the Load Generator Utility
» Creating a Load Generator Property File
» Configuring the csvgen Adapter in Your Application
» Event Inspector HTTP Publish-Subscribe Channel and Server
» How to Trace Events Using Oracle CEP Visualizer
» Scalability Using the ActiveActiveGroupBean
» Host Configuration High Availability Performance Tuning
» High Availability Input Adapter and Quality of Service
» High Availability Input Adapter Configuration
» Broadcast Output Adapter Configuration
» Oracle Coherence Heartbeat Frequency
» Oracle Coherence Serialization Oracle Coherence Performance Tuning Options
» Adapter Lifecycle Annotations OSGi Service Reference Annotations
» Example com.bea.wlevs.configuration.Activate
» Example com.bea.wlevs.configuration.Rollback
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