Class ThrottledTemplateProcessor

    • Field Detail

      • logger

        private static final org.slf4j.Logger logger
      • timerLogger

        private static final org.slf4j.Logger timerLogger
      • OUTPUT_TYPE_CHARS

        private static final java.lang.String OUTPUT_TYPE_CHARS
        See Also:
        Constant Field Values
      • OUTPUT_TYPE_BYTES

        private static final java.lang.String OUTPUT_TYPE_BYTES
        See Also:
        Constant Field Values
      • identifierGenerator

        private static final java.util.concurrent.atomic.AtomicLong identifierGenerator
      • identifier

        private final java.lang.String identifier
      • offset

        private int offset
      • eventProcessingFinished

        private boolean eventProcessingFinished
      • allProcessingFinished

        private volatile boolean allProcessingFinished
    • Method Detail

      • isFinished

        public boolean isFinished()
        Description copied from interface: IThrottledTemplateProcessor

        Checks whether the processing of the template has already finished.

        NOTE Implementations of this method must be thread-safe as, even if executions of the throttled processor (calls to process(...) methods) should never happen concurrently, determining whether a throttled processor has finished or not can happen concurrently from different threads as a way of short-cutting the execution of the processor (and avoid excessive consumption of upstream data, for example).

        Specified by:
        isFinished in interface IThrottledTemplateProcessor
        Returns:
        true if the template has already been fully processed, false if not.
      • computeFinish

        private boolean computeFinish()
                               throws java.io.IOException
        Throws:
        java.io.IOException
      • reportFinish

        private void reportFinish​(java.lang.String outputType)
      • getProcessorIdentifier

        public java.lang.String getProcessorIdentifier()
        Description copied from interface: IThrottledTemplateProcessor

        Returns an identifier for this processor that should enable the tracing of its executions.

        Given throttled processors are often used in reactive environments, in which different executions of a throttled processor might be performed by different threads (in a non-interleaved manner), this identifier should help identifying at the log trace the specific processor being executed independently of the thread ID.

        Though it is not completely required that the identifier returned by this method is unique by construction, it should be unique enough to be of practical use as an identifier.

        Specified by:
        getProcessorIdentifier in interface IThrottledTemplateProcessor
        Returns:
        the identifier for this processor object.
      • processAll

        public int processAll​(java.io.Writer writer)
        Description copied from interface: IThrottledTemplateProcessor

        Process the whole template (all parts remaining), with no limit in the amount of chars written to output.

        Specified by:
        processAll in interface IThrottledTemplateProcessor
        Parameters:
        writer - the writer output should be written to.
        Returns:
        the amount of bytes written to output.
      • processAll

        public int processAll​(java.io.OutputStream outputStream,
                              java.nio.charset.Charset charset)
        Description copied from interface: IThrottledTemplateProcessor

        Process the whole template (all parts remaining), with no limit in the amount of bytes written to output.

        Specified by:
        processAll in interface IThrottledTemplateProcessor
        Parameters:
        outputStream - the output stream output should be written to.
        charset - the charset to be used for encoding the written output into bytes.
        Returns:
        the amount of bytes written to output.
      • process

        public int process​(int maxOutputInChars,
                           java.io.Writer writer)
        Description copied from interface: IThrottledTemplateProcessor

        Process the template until at most the specified amount of chars has been written to output, then return control.

        Specified by:
        process in interface IThrottledTemplateProcessor
        Parameters:
        maxOutputInChars - the maximum amount of chars that the engine is allowed to output. A number < 0 or Integer.MAX_VALUE will mean "no limit".
        writer - the writer output should be written to.
        Returns:
        the amount of bytes written to output.
      • process

        public int process​(int maxOutputInBytes,
                           java.io.OutputStream outputStream,
                           java.nio.charset.Charset charset)
        Description copied from interface: IThrottledTemplateProcessor

        Process the template until at most the specified amount of bytes has been written to output, then return control.

        Specified by:
        process in interface IThrottledTemplateProcessor
        Parameters:
        maxOutputInBytes - the maximum amount of bytes that the engine is allowed to output. A number < 0 or Integer.MAX_VALUE will mean "no limit".
        outputStream - the output stream output should be written to.
        charset - the charset to be used for encoding the written output into bytes.
        Returns:
        the amount of bytes written to output.
      • process

        private int process​(int maxOutput,
                            java.lang.String outputType)