Package org.apache.catalina.tribes.group.interceptors

## Class GzipInterceptor

- java.lang.Object
- - org.apache.catalina.tribes.group.ChannelInterceptorBase
  - - org.apache.catalina.tribes.group.interceptors.GzipInterceptor

- All Implemented Interfaces:
    `ChannelInterceptor`, `Heartbeat`, `MembershipListener`

      public class GzipInterceptor
      extends ChannelInterceptorBase

- - ### Nested Class Summary

    - ### Nested classes/interfaces inherited from interface org.apache.catalina.tribes.ChannelInterceptor

      `ChannelInterceptor.InterceptorEvent`

  - ### Field Summary

    Fields
    Modifier and Type | Field | Description
    --- | --- | ---
    `static int` | `DEFAULT_BUFFER_SIZE` |
    `protected static StringManager` | `sm` |

    - ### Fields inherited from class org.apache.catalina.tribes.group.ChannelInterceptorBase

      `optionFlag`

  - ### Constructor Summary

    Constructors
    Constructor | Description
    --- | ---
    `GzipInterceptor()` |

  - ### Method Summary

    All Methods Static Methods Instance Methods Concrete Methods
    Modifier and Type | Method | Description
    --- | --- | ---
    `static byte[]` | `compress​(byte[] data)` |
    `static byte[]` | `decompress​(byte[] data)` |
    `void` | `messageReceived​(ChannelMessage msg)` | the `messageReceived` is invoked when a message is received.
    `void` | `sendMessage​(Member[] destination, ChannelMessage msg, InterceptorPayload payload)` | The `sendMessage` method is called when a message is being sent to one more destinations.

    - ### Methods inherited from class org.apache.catalina.tribes.group.ChannelInterceptorBase

      `fireInterceptorEvent, getChannel, getLocalMember, getMember, getMembers, getNext, getOptionFlag, getPrevious, hasMembers, heartbeat, memberAdded, memberDisappeared, okToProcess, setChannel, setNext, setOptionFlag, setPrevious, start, stop`

    - ### Methods inherited from class java.lang.Object

      `clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

- - ### Field Detail

    - #### sm

          protected static final StringManager sm

    - #### DEFAULT_BUFFER_SIZE

          public static final int DEFAULT_BUFFER_SIZE

      See Also:
        Constant Field Values

  - ### Constructor Detail

    - #### GzipInterceptor

          public GzipInterceptor()

  - ### Method Detail

    - #### sendMessage

          public void sendMessage​(Member[] destination,
                                  ChannelMessage msg,
                                  InterceptorPayload payload)
                           throws ChannelException

      Description copied from interface: `ChannelInterceptor`
      The `sendMessage` method is called when a message is being sent to one more destinations. The interceptor can modify any of the parameters and then pass on the message down the stack by invoking `getNext().sendMessage(destination,msg,payload)`
      Alternatively the interceptor can stop the message from being sent by not invoking `getNext().sendMessage(destination,msg,payload)`
      If the message is to be sent asynchronous the application can be notified of completion and errors by passing in an error handler attached to a payload object.
      The ChannelMessage.getAddress contains Channel.getLocalMember, and can be overwritten to simulate a message sent from another node.
      Specified by:
        `sendMessage` in interface `ChannelInterceptor`
      Overrides:
        `sendMessage` in class `ChannelInterceptorBase`
      Parameters:
        `destination` - Member[] - the destination for this message
        `msg` - ChannelMessage - the message to be sent
        `payload` - InterceptorPayload - the payload, carrying an error handler and future useful data, can be null
      Throws:
        `ChannelException` - if a serialization error happens.
      See Also:
        `ErrorHandler`, `InterceptorPayload`

    - #### messageReceived

          public void messageReceived​(ChannelMessage msg)

      Description copied from interface: `ChannelInterceptor`
      the `messageReceived` is invoked when a message is received. `ChannelMessage.getAddress()` is the sender, or the reply-to address if it has been overwritten.
      Specified by:
        `messageReceived` in interface `ChannelInterceptor`
      Overrides:
        `messageReceived` in class `ChannelInterceptorBase`
      Parameters:
        `msg` - ChannelMessage

    - #### compress

          public static byte[] compress​(byte[] data)
                                 throws java.io.IOException

      Throws:
        `java.io.IOException`

    - #### decompress

          public static byte[] decompress​(byte[] data)
                                   throws java.io.IOException

      Parameters:
        `data` - Data to decompress
      Returns:
        Decompressed data
      Throws:
        `java.io.IOException` - Compression error