WAS v8.5 > Reference > SetsAdvanced resource adapter properties
Use this page to specify advanced settings for resource adapters that comply with the v1.5 and 1.6 Java EE Connector Architecture (JCA) specification.
A resource adapter is an implementation of the JCA specification that provides access for applications to an enterprise information system (EIS), like DB2 , CICS , SAP and PeopleSoft, or provides access for an EIS to applications on the server. A resource adapter can also provide an EIS with the ability to communicate with message-driven beans configured on the server. Some resource adapters are provided by IBM , but third party vendors can provide their own resource adapters.
A resource adapter implementation is provided in a resource adapter archive file; this file has an extension of .rar. A resource adapter can be provided as a stand-alone adapter or as part of an application, in which case it is referred to as an embedded adapter.
To view this dmgr console page, click Resources > Resource Adapters > Resource adapters > resource_adapter > Advanced resource adapter properties.
Restrict the JVM to allow only one instance of this resource adapter
Prevents more than one instance of a resource adapter JavaBeans with a unique resource adapter implementation class name from existing in the same Java Virtual Machine (JVM). This field is only available on resource archives that allow definitions for activation specifications.
Enabling this setting imposes a restrictive condition on the inbound communications. For example, if two applications embed the same resource adapter, only the first application to start will be able to access resources through its embedded resource adapter. If a stand-alone resource adapter is configured for a single instance, no applications that embed that same resource adapter will be able to access resources.
Information Value Data type Boolean (checkbox) Default False (disabled)
Register this resource adapter with the high availability manager
The high availability (HA) manager will manage the lifecycle of a JCA resource adapter in a cluster. This option is only applicable to resource adapters with a version greater than JCA 1.0 and running on the Network Deployment version of WebSphere. Do not select this option without first consulting the product documentation for the resource adapter, because this option requires the resource adapter to support high availability of inbound messaging. This field is only available on resource archives that allow definitions for activation specifications.
Enabling this setting imposes a restrictive condition on the inbound communications.
This setting can be implemented with:
- Endpoint failover: allows only one resource adapter in an HA group to receive messages across multiple servers. The result is that only one resource adapter can have endpoints active at one time.
- Resource adapter instance failover: allows only one resource adapter in an HA group to be started across multiple servers. Inbound or outbound communication is limited to one resource adapter in the cluster.
Information Value Data type Boolean (checkbox with implementation options) Default False (disabled)
Related concepts:
Relational resource adapters and JCA
Related
Configure resource adapters
Reference:
Administrative console scope settings
Thread pool settings