{"id":3388,"date":"2012-02-03T13:02:46","date_gmt":"2012-02-03T18:02:46","guid":{"rendered":"http:\/\/jianmingli.com\/wp\/?p=3388"},"modified":"2012-06-19T16:15:51","modified_gmt":"2012-06-19T21:15:51","slug":"1z0-451-working-with-mediator-components","status":"publish","type":"post","link":"https:\/\/jianmingli.com\/wp\/?p=3388","title":{"rendered":"1Z0-451: Working with Mediator Components"},"content":{"rendered":"
\n

Contents<\/h2>\n
    \n\t
  1. \n\t\tExplain the Mediator component and its features<\/a>\n\t\t
      \n\t\t\t
    1. \n\t\t\t\tMediator Component<\/a>\n\t\t\t<\/li>\n\t\t\t
    2. \n\t\t\t\tFeatures<\/a>\n\t\t\t<\/li>\n\t\t<\/ol>\n\t
    3. \n\t\tDefine business events and the Event Delivery Network (EDN)<\/a>\n\t\t
        \n\t\t\t
      1. \n\t\t\t\tOverview<\/a>\n\t\t\t<\/li>\n\t\t\t
      2. \n\t\t\t\tLocal and Remote Events Boundaries<\/a>\n\t\t\t<\/li>\n\t\t<\/ol>\n\t
      3. \n\t\tCreate and configure a Mediator service component<\/a>\n\t<\/li>\n\t
      4. \n\t\tCreate Mediator routing rules<\/a>\n\t<\/li>\n\t
      5. \n\t\tReferences<\/a>\n\t<\/li>\n<\/ol>\n<\/ol>\n<\/div>\n
         <\/div>\n

        This is part of 1Z0-451: Oracle SOA Foundation Practitioner Exam<\/a><\/p>\n

        Explain the Mediator component and its features<\/h2><\/span>\n

        * See here<\/a>.<\/p>\n

        Mediator Component<\/h3><\/span>\n

        * Provides a lightweight framework to mediate between various components within a composite application.
        \n* Converts data to facilitate communication between different interfaces exposed by different components that are wired to build a SOA composite application.<\/p>\n

        Features<\/h3><\/span>\n

        * Content-Based and Header-Based Routing
        \n* Synchronous and Asynchronous Interactions
        \n* Sequential and Parallel Routing of Messages
        \n* Transformations
        \n* Validations: using Schematron or an XSD file.
        \n* Java Callouts
        \n* Event Handling
        \n– supports subscribing to business events and raising business events.
        \n* Dynamic Routing
        \n– via business rules.
        \n– outbound services can be called only over SOAP.
        \n– No assignment, transformation, or validation can be performed.
        \n– not possible for Oracle Mediators with a synchronous or one-way interface.
        \n* Error Handling, supports both
        \n– manual error handling
        \n– fault policy
        \n* Echo
        \n– echoing source messages back to the initial caller after any transformations, validations, assignments, or sequencing operations are performed.
        \n* Multiple Part Messages<\/p>\n

        Define business events and the Event Delivery Network (EDN)<\/h2><\/span>\n

        * See here<\/a>.<\/p>\n

        Overview<\/h3><\/span>\n

        * Business events do not <\/em>care about client subscribers:
        \n– Typically one-way, fire-and-forget, and asynchronous.
        \n– Do not care if there are receivers.
        \n– Do not care where receivers are and what they do with the data.
        \n– Do not wait for receivers to complete.
        \n* Use invocation if there is dependency on event receivers.
        \n* A business event is defined using the event definition language (EDL) which contains:
        \n– Global name: typically a Java package name.
        \n– Payload definition: mostly XSD.
        \n– Example:<\/p>\n

        \r\n\r\n\r\n   \r\n\r\n   \r\n      \r\n   <\/event-definition>\r\n\r\n   \r\n      \r\n   <\/event-definition>\r\n<\/definitions>\r\n<\/pre>\n
        * Business events are deployed <\/em>to the metadata service (MDS) repository.
        \n– EDL publishing: deploying a business event to MDS along with its artifacts such as XSDs.
        \n– EDL can not <\/em>be unpublished.
        \n* Business events are published <\/em>in the Event Delivery Network (EDN).
        \n– The EDN runs within every SOA instance.
        \n– Raised events are delivered by EDN to the subscribing service components.
        \n* Mediator and BPEL service components can subscribe to and publish events.
        \n* EDN has two different implementations:
        \n– EDN-DB (preferred): uses an Oracle database as a back-end store.
        \n– EDN-JMS: use a generic JMS queue as a back-end store.<\/p>\n
        Local and Remote Events Boundaries<\/h3><\/span>\n
        * Local event connection.
        \n– Used if receiver resides on the same WebLogic Server.
        \n– Synchronous subscriptions are executed synchronously.
        \n* Remote event connection.
        \n– Used if receiver resides on a different container (different JVM).
        \n– Only supports asynchronous subscriptions.<\/p>\n
        Create and configure a Mediator service component<\/h2><\/span>\n
        Create Mediator routing rules<\/h2><\/span>\n
        Next>> Human Workflow<\/a><\/p>\n
        References<\/h2><\/span>\n
        * Getting Started with Oracle Mediator<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"
        This is part of 1Z0-451: Oracle SOA Foundation Practitioner Exam Explain the Mediator component and its features * See here. Mediator Component * Provides a lightweight framework to mediate between various components within a composite application. * Converts data to … Continue reading →<\/span><\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_exactmetrics_skip_tracking":false,"_exactmetrics_sitenote_active":false,"_exactmetrics_sitenote_note":"","_exactmetrics_sitenote_category":0,"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":false,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[107],"tags":[],"class_list":["post-3388","post","type-post","status-publish","format-standard","hentry","category-certification"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/p8cRUO-SE","_links":{"self":[{"href":"https:\/\/jianmingli.com\/wp\/index.php?rest_route=\/wp\/v2\/posts\/3388","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/jianmingli.com\/wp\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/jianmingli.com\/wp\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/jianmingli.com\/wp\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/jianmingli.com\/wp\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=3388"}],"version-history":[{"count":7,"href":"https:\/\/jianmingli.com\/wp\/index.php?rest_route=\/wp\/v2\/posts\/3388\/revisions"}],"predecessor-version":[{"id":4754,"href":"https:\/\/jianmingli.com\/wp\/index.php?rest_route=\/wp\/v2\/posts\/3388\/revisions\/4754"}],"wp:attachment":[{"href":"https:\/\/jianmingli.com\/wp\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=3388"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/jianmingli.com\/wp\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=3388"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/jianmingli.com\/wp\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=3388"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}