All Known Implementing Classes:

ProtonEnginePipeline, ProtonEnginePipelineProxy
```
public interface EnginePipeline
```
Pipeline of handlers for Engine work.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`EnginePipeline`	`addFirst(String name, EngineHandler handler)`	Adds the given handler to the front of the pipeline with the given name stored for later lookup or remove operations.
`EnginePipeline`	`addLast(String name, EngineHandler handler)`	Adds the given handler to the end of the pipeline with the given name stored for later lookup or remove operations.
`Engine`	`engine()`
`EngineHandler`	`find(String name)`	Finds and returns first handler that is found in the pipeline that matches the given name.
`EnginePipeline`	`fireEngineStarting()`	Fires an engine starting event to each handler in the pipeline.
`EnginePipeline`	`fireEngineStateChanged()`	Fires an engine state changed event to each handler in the pipeline.
`EnginePipeline`	`fireFailed(EngineFailedException failure)`	Fires an engine failed event into each `EngineHandler` in the pipeline indicating that the engine is now failed and should not accept or produce new work.
`EnginePipeline`	`fireRead(ProtonBuffer input)`	Fires a read event consisting of the given `ProtonBuffer` into the pipeline starting from the last `EngineHandler` in the pipeline and moving through each until the incoming work is fully processed.
`EnginePipeline`	`fireRead(HeaderEnvelope header)`	Fires a read event consisting of the given `HeaderEnvelope` into the pipeline starting from the last `EngineHandler` in the pipeline and moving through each until the incoming work is fully processed.
`EnginePipeline`	`fireRead(IncomingAMQPEnvelope envelope)`	Fires a read event consisting of the given `IncomingAMQPEnvelope` into the pipeline starting from the last `EngineHandler` in the pipeline and moving through each until the incoming work is fully processed.
`EnginePipeline`	`fireRead(SASLEnvelope envelope)`	Fires a read event consisting of the given `SASLEnvelope` into the pipeline starting from the last `EngineHandler` in the pipeline and moving through each until the incoming work is fully processed.
`EnginePipeline`	`fireWrite(ProtonBuffer buffer, Runnable ioComplete)`	Fires a write event consisting of the given `ProtonBuffer` into the pipeline starting from the first `EngineHandler` in the pipeline and moving through each until the outgoing work is fully processed.
`EnginePipeline`	`fireWrite(HeaderEnvelope envelope)`	Fires a write event consisting of the given `HeaderEnvelope` into the pipeline starting from the first `EngineHandler` in the pipeline and moving through each until the outgoing work is fully processed.
`EnginePipeline`	`fireWrite(OutgoingAMQPEnvelope envelope)`	Fires a write event consisting of the given `OutgoingAMQPEnvelope` into the pipeline starting from the first `EngineHandler` in the pipeline and moving through each until the outgoing work is fully processed.
`EnginePipeline`	`fireWrite(SASLEnvelope envelope)`	Fires a write event consisting of the given `SASLEnvelope` into the pipeline starting from the first `EngineHandler` in the pipeline and moving through each until the outgoing work is fully processed.
`EngineHandler`	`first()`
`EngineHandlerContext`	`firstContext()`
`EngineHandler`	`last()`
`EngineHandlerContext`	`lastContext()`
`EnginePipeline`	`remove(String name)`	Removes the first handler that is found in the pipeline that matches the given name.
`EnginePipeline`	`remove(EngineHandler handler)`	Removes the given `EngineHandler` from the pipeline if present.
`EnginePipeline`	`removeFirst()`	Removes the first `EngineHandler` in the pipeline.
`EnginePipeline`	`removeLast()`	Removes the last `EngineHandler` in the pipeline.

- Method Detail
  - engine
```
Engine engine()
```
    Returns:
    
    the Engine that this pipeline is linked to.
  - addFirst
```
EnginePipeline addFirst(String name,
                        EngineHandler handler)
```
    Adds the given handler to the front of the pipeline with the given name stored for later lookup or remove operations. It is not mandatory that each handler have unique names although if handlers do share a name the remove(String) method will only remove them one at a time starting from the first in the pipeline.
    
    Parameters:
    
    name - The name to assign to the handler
    
    handler - The EngineHandler to add into the pipeline.
    
    Returns:
    
    this EnginePipeline.
    
    Throws:
    
    IllegalArgumentException - if name is null or empty or the handler is null
  - addLast
```
EnginePipeline addLast(String name,
                       EngineHandler handler)
```
    Adds the given handler to the end of the pipeline with the given name stored for later lookup or remove operations. It is not mandatory that each handler have unique names although if handlers do share a name the remove(String) method will only remove them one at a time starting from the first in the pipeline.
    
    Parameters:
    
    name - The name to assign to the handler
    
    handler - The EngineHandler to add into the pipeline.
    
    Returns:
    
    this EnginePipeline.
    
    Throws:
    
    IllegalArgumentException - if name is null or empty or the handler is null
  - removeFirst
```
EnginePipeline removeFirst()
```
    Removes the first EngineHandler in the pipeline.
    
    Returns:
    
    this EnginePipeline.
  - removeLast
```
EnginePipeline removeLast()
```
    Removes the last EngineHandler in the pipeline.
    
    Returns:
    
    this EnginePipeline.
  - remove
```
EnginePipeline remove(String name)
```
    Removes the first handler that is found in the pipeline that matches the given name.
    
    Parameters:
    
    name - The name to search for in the pipeline moving from first to last.
    
    Returns:
    
    this EnginePipeline.
  - remove
```
EnginePipeline remove(EngineHandler handler)
```
    Removes the given EngineHandler from the pipeline if present.
    
    Parameters:
    
    handler - The handler instance to remove if contained in the pipeline.
    
    Returns:
    
    this EnginePipeline.
  - find
```
EngineHandler find(String name)
```
    Finds and returns first handler that is found in the pipeline that matches the given name.
    
    Parameters:
    
    name - The name to search for in the pipeline moving from first to last.
    
    Returns:
    
    the EngineHandler that matches the given name or null if none in the pipeline.
  - first
```
EngineHandler first()
```
    Returns:
    
    the first EngineHandler in the pipeline or null if empty.
  - last
```
EngineHandler last()
```
    Returns:
    
    the last EngineHandler in the pipeline or null if empty.
  - firstContext
```
EngineHandlerContext firstContext()
```
    Returns:
    
    the first EngineHandlerContext in the pipeline or null if empty.
  - lastContext
```
EngineHandlerContext lastContext()
```
    Returns:
    
    the last EngineHandlerContext in the pipeline or null if empty.
  - fireEngineStarting
```
EnginePipeline fireEngineStarting()
```
    Fires an engine starting event to each handler in the pipeline. Should be used by the engine implementation to signal its handlers that they should initialize.
    
    Returns:
    
    this EnginePipeline.
  - fireEngineStateChanged
```
EnginePipeline fireEngineStateChanged()
```
    Fires an engine state changed event to each handler in the pipeline. Should be used by the engine implementation to signal its handlers that they should respond to the new engine state, e.g. the engine failed or was shutdown.
    
    Returns:
    
    this EnginePipeline.
  - fireRead
```
EnginePipeline fireRead(ProtonBuffer input)
```
    Fires a read event consisting of the given ProtonBuffer into the pipeline starting from the last EngineHandler in the pipeline and moving through each until the incoming work is fully processed. If the read events reaches the head of the pipeline and is not handled by any handler an error is thrown and the engine should enter the failed state.
    
    Parameters:
    
    input - The ProtonBuffer to inject into the engine pipeline.
    
    Returns:
    
    this EnginePipeline.
  - fireRead
```
EnginePipeline fireRead(HeaderEnvelope header)
```
    Fires a read event consisting of the given HeaderEnvelope into the pipeline starting from the last EngineHandler in the pipeline and moving through each until the incoming work is fully processed. If the read events reaches the head of the pipeline and is not handled by any handler an error is thrown and the engine should enter the failed state.
    
    Parameters:
    
    header - The HeaderEnvelope to inject into the engine pipeline.
    
    Returns:
    
    this EnginePipeline.
  - fireRead
```
EnginePipeline fireRead(SASLEnvelope envelope)
```
    Fires a read event consisting of the given SASLEnvelope into the pipeline starting from the last EngineHandler in the pipeline and moving through each until the incoming work is fully processed. If the read events reaches the head of the pipeline and is not handled by any handler an error is thrown and the engine should enter the failed state.
    
    Parameters:
    
    envelope - The SASLEnvelope to inject into the engine pipeline.
    
    Returns:
    
    this EnginePipeline.
  - fireRead
```
EnginePipeline fireRead(IncomingAMQPEnvelope envelope)
```
    Fires a read event consisting of the given IncomingAMQPEnvelope into the pipeline starting from the last EngineHandler in the pipeline and moving through each until the incoming work is fully processed. If the read events reaches the head of the pipeline and is not handled by any handler an error is thrown and the engine should enter the failed state.
    
    Parameters:
    
    envelope - The IncomingAMQPEnvelope to inject into the engine pipeline.
    
    Returns:
    
    this EnginePipeline.
  - fireWrite
```
EnginePipeline fireWrite(HeaderEnvelope envelope)
```
    Fires a write event consisting of the given HeaderEnvelope into the pipeline starting from the first EngineHandler in the pipeline and moving through each until the outgoing work is fully processed. If the write events reaches the tail of the pipeline and is not handled by any handler an error is thrown and the engine should enter the failed state. It is expected that after the fire write method returns the given HeaderEnvelope will have been written or if held for later the object must be copied.
    
    Parameters:
    
    envelope - The HeaderEnvelope to inject into the engine pipeline.
    
    Returns:
    
    this EnginePipeline.
  - fireWrite
```
EnginePipeline fireWrite(OutgoingAMQPEnvelope envelope)
```
    Fires a write event consisting of the given OutgoingAMQPEnvelope into the pipeline starting from the first EngineHandler in the pipeline and moving through each until the outgoing work is fully processed. If the write events reaches the tail of the pipeline and is not handled by any handler an error is thrown and the engine should enter the failed state. It is expected that after the fire write method returns the given OutgoingAMQPEnvelope will have been written or if held for later the object must be copied. When the payload given exceeds the maximum allowed frame size when encoded into an outbound frame the encoding handler should either throw an error in the case that the performative being written cannot truncate its payload or should invoke the payload to large handler of the envelope before re-encoding the outbound performative and truncating the payload.
    
    Parameters:
    
    envelope - The OutgoingAMQPEnvelope to inject into the engine pipeline.
    
    Returns:
    
    this EnginePipeline.
  - fireWrite
```
EnginePipeline fireWrite(SASLEnvelope envelope)
```
    Fires a write event consisting of the given SASLEnvelope into the pipeline starting from the first EngineHandler in the pipeline and moving through each until the outgoing work is fully processed. If the write events reaches the tail of the pipeline and is not handled by any handler an error is thrown and the engine should enter the failed state. It is expected that after the fire write method returns the given SASLEnvelope will have been written or if held for later the object must be copied.
    
    Parameters:
    
    envelope - The SASLEnvelope to inject into the engine pipeline.
    
    Returns:
    
    this EnginePipeline.
  - fireWrite
```
EnginePipeline fireWrite(ProtonBuffer buffer,
                         Runnable ioComplete)
```
    Fires a write event consisting of the given ProtonBuffer into the pipeline starting from the first EngineHandler in the pipeline and moving through each until the outgoing work is fully processed. If the write events reaches the tail of the pipeline and is not handled by any handler an error is thrown and the engine should enter the failed state.
    
    Parameters:
    
    buffer - The ProtonBuffer to inject into the engine pipeline.
    
    ioComplete - An optional callback that should be signaled when the underlying transport complete the I/O write
    
    Returns:
    
    this EnginePipeline.
  - fireFailed
```
EnginePipeline fireFailed(EngineFailedException failure)
```
    Fires an engine failed event into each EngineHandler in the pipeline indicating that the engine is now failed and should not accept or produce new work.
    
    Parameters:
    
    failure - The cause of the engine failure.
    
    Returns:
    
    this EnginePipeline.

Interface EnginePipeline

Method Summary

Method Detail

engine

addFirst

addLast

removeFirst

removeLast

remove

remove

find

first

last

firstContext

lastContext

fireEngineStarting

fireEngineStateChanged

fireRead

fireRead

fireRead

fireRead

fireWrite

fireWrite

fireWrite

fireWrite

fireFailed