Class PipeLine

  • All Implemented Interfaces:
    ICacheEnabled<String,​String>, HasTransactionAttribute, IConfigurationAware, IScopeProvider, HasStatistics, org.springframework.beans.factory.Aware, org.springframework.context.ApplicationContextAware

    public class PipeLine
    extends TransactionAttributes
    implements ICacheEnabled<String,​String>, HasStatistics, IConfigurationAware
    Required in each Adapter to transform incoming messages. A pipeline is a sequence of pipes. A pipeline also defines its allowed end states using the <Exits> tag.

    The pipes in a PipeLine may not be executed in sequential order, see PipeForward.

    A pipeline gathers statistics about the messages it processes.

    In the AppConstants there may be a property named log.logIntermediaryResults (true/false) which indicates whether the intermediary results (between calling pipes) have to be logged.

    Transaction control

    THE FOLLOWING TO BE UPDATED, attribute 'transacted' replaced by 'transactionAttribute' If transacted is set to true, messages will be processed under transaction control. Processing by XA-compliant pipes (i.e. Pipes that implement the IXAEnabled-interface, set their transacted-attribute to true and use XA-compliant resources) will then either be committed or rolled back in one transaction. If transacted is set to true, either an existing transaction (started by a transactional receiver) is joined, or new one is created (if the message processing request is not initiated by a receiver under transaction control. Messages are only committed or rolled back by the Pipeline if it started the transaction itself. If the pipeline joined an existing transaction, the commit or rollback is left to the object that started the transaction, i.e. the receiver. In the latter case the pipeline can indicate to the receiver that the transaction should be rolled back (by calling UserTransaction.setRollBackOnly()). The choice whether to either commit (by Pipeline or Receiver) or rollback (by Pipeline or Receiver) is made as follows: If the processing of the message concluded without exceptions and the status of the transaction is STATUS_ACTIVE (i.e. normal) the transaction will be committed. Otherwise it will be rolled back, or marked for roll back by the calling party.
    Johan Verrips
    • Constructor Detail

      • PipeLine

        public PipeLine()
    • Method Detail

      • getPipe

        public IPipe getPipe​(int index)
      • configurationSucceeded

        public boolean configurationSucceeded()
      • getPipeLineSize

        public int getPipeLineSize()
        the number of pipes in the pipeline
      • process

        public PipeLineResult process​(String messageId,
                                      Message message,
                                      PipeLineSession pipeLineSession)
                               throws PipeRunException
        The process method does the processing of a message.
        It retrieves the first pipe to execute from the firstPipe
        message - The message as received from the Listener
        messageId - A unique id for this message, used for logging purposes.
        the result of the processing.
        PipeRunException - when something went wrong in the pipes.
      • setAdapter

        public void setAdapter​(Adapter adapter)
        Register the adapterName of this Pipelineprocessor.
        adapter -
      • stop

        public void stop()
        Close the pipeline. This will call the stop() method of all registered Pipes
        See Also:
      • stopPipe

        protected void stopPipe​(String type,
                                IPipe pipe)
      • setInputValidator

        public void setInputValidator​(IValidator inputValidator)
        Request validator, or combined validator for request and response
      • setOutputValidator

        public void setOutputValidator​(IValidator outputValidator)
        Optional pipe to validate the response. Can be specified if the response cannot be validated by the request validator
      • setInputWrapper

        public void setInputWrapper​(IWrapperPipe inputWrapper)
        Optional pipe to extract the request message from its envelope
      • setOutputWrapper

        public void setOutputWrapper​(IWrapperPipe outputWrapper)
        Optional pipe to wrap the response message in an envelope
      • setPipeLineExits

        public void setPipeLineExits​(PipeLineExits exits)
        PipeLine exits. If no exits are specified, a default one is created with name="READY" and state="SUCCESS"
      • registerPipeLineExit

        public void registerPipeLineExit​(PipeLineExit exit)
        PipeLine exits.
      • setGlobalForwards

        public void setGlobalForwards​(PipeForwards forwards)
        Optional global forwards that will be added to every pipe, when the forward name has not been explicitly set. For example the <forward name="exception" path="error_exception" />, which will add the 'exception' forward to every pipe in the pipeline.
      • setLocker

        public void setLocker​(Locker locker)
        Optional Locker, to avoid parallel execution of the PipeLine by multiple threads on multiple servers. The Pipeline is NOT executed (and is considered to have ended successfully) when the lock cannot be obtained, e.g. in case another thread, may be in another server, holds the lock and does not release it in a timely manner. If only the number of threads executing this PipeLine needs to be limited, the attribute maxThreads can be set instead, avoiding the database overhead.
      • addPipe

        public void addPipe​(IPipe pipe)
                     throws ConfigurationException
        Register an Pipe at this pipeline. The name is also put in the globalForwards table (with forward-name=pipename and forward-path=pipename, so that pipe can look for a specific pipe-name. If already a globalForward exists under that name, the pipe is NOT added, allowing globalForwards to prevail.
        See Also:
      • setFirstPipe

        public void setFirstPipe​(String pipeName)
        Name of the first pipe to execute when a message is to be processed
        Default value
        first pipe of the pipeline
      • setMaxThreads

        public void setMaxThreads​(int newMaxThreads)
        Maximum number of threads that may execute this Pipeline simultaneously, use 0 to disable limit
        Default value
      • setStoreOriginalMessageWithoutNamespaces

        public void setStoreOriginalMessageWithoutNamespaces​(boolean b)
        If set true the original message without namespaces (and prefixes) is stored under the session key originalMessageWithoutNamespaces
        Default value
      • setMessageSizeWarn

        public void setMessageSizeWarn​(String s)
        If messageSizeWarn>=0 and the size of the input or result pipe message exceeds the value specified a warning message is logged. You can specify the value with the suffixes KB, MB or GB
        Default value
        application default (30MB)
      • getMessageSizeWarnNum

        public long getMessageSizeWarnNum()
      • setTransformNullMessage

        public void setTransformNullMessage​(String s)
        when specified and null is received as a message the message is changed to the specified value
      • setAdapterToRunBeforeOnEmptyInput

        @ConfigurationWarning("Please use an XmlIf-pipe and call a sub-adapter to retrieve a new/different response")
        public void setAdapterToRunBeforeOnEmptyInput​(String s)
        when specified and an empty message is received the specified adapter is run before passing the message (response from specified adapter) to the pipeline
      • setApplicationContext

        public void setApplicationContext​(org.springframework.context.ApplicationContext applicationContext)
        Specified by:
        setApplicationContext in interface org.springframework.context.ApplicationContextAware
      • getFirstPipe

        public String getFirstPipe()
      • getMaxThreads

        public int getMaxThreads()
      • isStoreOriginalMessageWithoutNamespaces

        public boolean isStoreOriginalMessageWithoutNamespaces()
      • getAdapterToRunBeforeOnEmptyInput

        public String getAdapterToRunBeforeOnEmptyInput()
      • getInputValidator

        public IValidator getInputValidator()
      • getOutputValidator

        public IValidator getOutputValidator()
      • getLocker

        public Locker getLocker()
      • getAdapter

        public Adapter getAdapter()
      • setPipeLineProcessor

        public void setPipeLineProcessor​(PipeLineProcessor pipeLineProcessor)