Specifying the Key Used to Index an Oracle CEP Local Cache
12.2.4 Configuring an Oracle CEP Local Cache Store
You can configure an Oracle CEP local cache with a custom store that is responsible for writing data from the cache to a backing store, such as a table in a database. You configure a cache store by using the wlevs:cache-store child element of the wlevs:cache element to specify the bean that does the actual storing work, as shown in the following example: wlevs:caching-system id=caching-system-id ... wlevs:cache id=cache-id name=alternative-cache-name wlevs:caching-system ref=caching-system-id wlevs:cache-store ref=cache-store-id wlevs:cache ... bean id=cache-store-id class=wlevs.example.MyCacheStore In the example, the cache-store-id Spring bean does the work of writing the data from the cache to the backing store; it is referenced by the cache using the ref attribute of the wlevs:cache-store child element. You must program the wlevs.example.MyCacheStore class yourself, and it must implement the com.bea.cache.jcache.CacheStore interface. This interface includes the store method that stores the data in the backing store using the passed key; Oracle CEP calls this method when it inserts data into the cache. The interface also includes the storeAll method for storing a batch of data to a backing store in the case that you have configured asynchronous writes for a cache with the write-behind configuration element.12.3 Configuring an Oracle Coherence Caching System and Cache
You can configure your application to use the Oracle Coherence caching system and cache. Use this caching system if you plan to deploy your application to a multi-server domain. Using Oracle Coherence, only the first caching-system can be configured in a server. Oracle CEP will ignore any other caching systems you might configure. Configuring Caching 12-15 To configure an Oracle Coherence caching system and cache: 1. Decide whether or not your Oracle Coherence cache will be used exclusively by this application or shared amongst two or more applications. For more information, see Section 12.3.5, Configuring a Shared Oracle Coherence Cache . 2. Declare the Oracle Coherence caching system in the EPN assembly file. To declare a caching system that uses the Oracle Coherence implementation declaratively in the EPN assembly file, use the wlevs:caching-system element as shown in the following example: wlevs:caching-system id=caching-system-id provider=coherence advertise=false The value of the id attribute must match the name you specify for the caching system in the application’s component configuration file see step 4. 3. Declare one or more caches for this caching system in the EPN assembly file. After you have declared a caching system for an application, you configure one or more caches using the wlevs:cache element: wlevs:caching-system id=caching-system-id provider=coherence advertise=false ... wlevs:cache id=myCache advertise=false wlevs:caching-system ref=caching-system-id wlevs:cache The wlevs:cache element id attribute is mandatory. This attribute maps to the name of a cache in the Oracle Coherence configuration files see step 4. The name attribute is optional; specify it only if the name of the cache in the caching system is different from its ID. The wlevs:caching-system child element references the already-declared caching system that contains the cache. You must specify this child element only if the caching system is ambiguous: there is more than one caching system declared either implicitly or explicitly or if the caching system is in a different application or bundle. Note: Before you can legally use Oracle CEP with Oracle Coherence, you must obtain a valid Coherence license such as a license for Coherence Enterprise Edition, Coherence Grid Edition, or Oracle WebLogic Application Grid. For more information on Oracle Coherence, see http:www.oracle.comtechnologyproductscoherence index.html . Note: It is assumed in this section that you have already created an Oracle CEP application along with its EPN assembly file and that you want to update the application to use caching. If you have not, refer to Chapter 1, Overview of Creating Oracle CEP Applications for details. 12-16 Oracle Complex Event Processing Developers Guide The caching system is responsible for creating the cache associated with a particular name and returning a reference to the cache. The resulting cache bean implements the java.util.Map interface. For more information, see Section 12.3.5, Configuring a Shared Oracle Coherence Cache . 4. Configure the caching system and its caches by updating the caching configuration file for the application. See Section 12.3.1, Configuring the Oracle Coherence Caching System and Caches. 5. Optionally, override the default cache configuration by updating the EPN assembly file with one or more additional cache element child elements. ■ Specify that a cache is an event sink by configuring it as a listener to another component in the event processing network. See Section 12.3.1, Configuring the Oracle Coherence Caching System and Caches. ■ Specify that a cache is an event source to which another component in the event processing network listens. See Section 12.3.2, Configuring an Oracle Coherence Cache as an Event Listener. ■ Configure either a wlevs:cache-loader or a wlevs:cache-store child element of the wlevs:cache element in the EPN assembly file, but not both. This is because Oracle Coherence combines the loader and store into a single component. You specify a cache loader when the backing store is read-only and a cache store when the backing store is read-write See Section 12.3.4, Configuring an Oracle Coherence Cache Loader or Store. 6. Access the Oracle Coherence cache: – Optionally reference the Oracle Coherence cache in a query statement. See: Section 12.5, Accessing a Cache From an Oracle CQL Statement Section 12.6, Accessing a Cache From an EPL Statement – Optionally configure and program a custom adapter, business POJO, or Oracle CQL or EPL user-defined function to access the Oracle Coherence cache. The configuration is done in the EPN assembly file and the programming is done in the Java file that implements the adapter, POJO, or user-defined function. See: Section 12.7, Accessing a Cache From an Adapter Section 12.8, Accessing a Cache From a Business POJO Section 12.9, Accessing a Cache From an Oracle CQL User-Defined Function Section 12.10, Accessing a Cache From an EPL User-Defined Function – Optionally, access the Oracle Coherence cache using JMX.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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