What is Idempotent in SOA?
According to the SOA Suite 12c documentation, an idempotent activity is an activity that can be safely retried. It means if your BPEL Process fails, a rollback operation will be executed and all data won’t be persisted in the database.
What is dehydration in SOA?
Dehydration – Offers Reliability, fail-over protection:Over the life cycle of a BPEL instance, the instance with its current state of execution may be saved in a database. When a BPEL instance is saved to a database, the instance is known as being dehydrated.
What is ECID SOA?
The ECID (Execution Context ID) that is used in Fusion Middleware to identify a conversation across components in one or more WebLogic servers can be used to trace that conversation into the database. When Service Bus next calls out to a SOA Composite application on another WLS Managed Server, this ECID is passed.
What is EDN in SOA?
EDN uses JMS to deliver events from subscribers to publishers, but the configuration of JMS queues and topics and any associated filters is hidden from users of the EDN Service. Advantages: When an event is published, it will be published in the entire domain.
What is dehydration store in SOA 11g?
Dehydration in BPEL – Oracle SOA Suite 11g. Over the life cycle of a BPEL instance, the instance with its current state of execution may be saved in a database. When a BPEL instance is saved to a database, the instance is known as being dehydrated.
What is dehydration store?
The process of updating the state of the BPEL process services in the database is called Dehydration. The asynchronous and synchronous processes mainly use the Dehydration Store to save the state of the process while waiting for asynchronous callbacks.
Why do we need to dehydrate SOA instance?
Note: A BPEL invoke activity is by default (true) an idempotent activity, meaning that the BPEL process does not dehydrate instances immediately after invoke activities. If idempotent is set to false, the invoke activity is dehydrated immediately after execution and recorded in the dehydration store.
What is execution context id?
Execution Context ID (ECID) is a unique identifier to correlate events or requests associated with the same transaction across several Fusion Middleware components. The ECID value for a particular request is generated at the first layer and is passed down to the subsequent layers.
What is BPEL in Web service?
Business Process Execution Language for Web Services (BPEL or BPEL4WS) is a language used for the definition and execution of business processes using Web services. BPEL enables the top-down realization of Service Oriented Architecture (SOA) through composition, orchestration, and coordination of Web services.
What is the difference between Pick and receive activity in SOA?
Pick Activity: This activity is very similar to the receive construct. But unlike the receive activity which gets triggered only when a partner link invokes it, the Pick activity has 2 choices (On Message & On Alarm) – It waits for a message from a partner link or triggers another set of activities on timeout.
Can we use BPEL as a programming language?
It provides a standardized way for programming in the large in a service-oriented world (SOA). BPEL is a programming language and does have a graphical representation.
What is Pick activity in SOA 12c?
Pick activity has two branches, OnMessage Branch and OnAlarm Branch which are explained below. Out of these two branches, only one will execute. OnMessage is same as Receive activity. It is used when we need to receive message from external system. OnAlarm branch is used when we want to specify expiry time.