RecordParser (Vert.x Stack - Docs 4.4.9 API)

All Superinterfaces:

Handler<Buffer>, ReadStream<Buffer>, StreamBase
```
public interface RecordParser
extends Handler<Buffer>, ReadStream<Buffer>
```
A helper class which allows you to easily parse protocols which are delimited by a sequence of bytes, or fixed size records.
Instances of this class take as input Buffer instances containing raw bytes, and output records.
For example, if I had a simple ASCII text protocol delimited by '\n' and the input was the following:
```
 buffer1:HELLO\nHOW ARE Y
 buffer2:OU?\nI AM
 buffer3: DOING OK
 buffer4:\n
 
```
Then the output would be:
```
 buffer1:HELLO
 buffer2:HOW ARE YOU?
 buffer3:I AM DOING OK
 
```
Instances of this class can be changed between delimited mode and fixed size record mode on the fly as individual records are read, this allows you to parse protocols where, for example, the first 5 records might all be fixed size (of potentially different sizes), followed by some delimited records, followed by more fixed size records.
Instances of this class can't currently be used for protocols where the text is encoded with something other than a 1-1 byte-char mapping.
Please see the documentation for more information.
Author:

Tim Fox, Lars Timm

Method Summary

All Methods Static Methods Instance Methods Abstract Methods Default Methods
Modifier and Type	Method and Description
`void`	`delimitedMode(Buffer delim)` Flip the parser into delimited mode, and where the delimiter can be represented by the delimiter `delim`.
`void`	`delimitedMode(String delim)` Flip the parser into delimited mode, and where the delimiter can be represented by the String `delim` encoded in latin-1 .
`RecordParser`	`endHandler(Handler<Void> endHandler)` Set an end handler.
`RecordParser`	`exceptionHandler(Handler<Throwable> handler)` Set an exception handler on the read stream.
`RecordParser`	`fetch(long amount)` Fetch the specified `amount` of elements.
`void`	`fixedSizeMode(int size)` Flip the parser into fixed size mode, where the record size is specified by `size` in bytes.
`void`	`handle(Buffer buffer)` This method is called to provide the parser with data.
`RecordParser`	`handler(Handler<Buffer> handler)` Set a data handler.
`RecordParser`	`maxRecordSize(int size)` Set the maximum allowed size for a record when using the delimited mode.
`static RecordParser`	`newDelimited(Buffer delim)` Create a new `RecordParser` instance, initially in delimited mode, and where the delimiter can be represented by the `Buffer` delim.
`static RecordParser`	`newDelimited(Buffer delim, Handler<Buffer> output)` Like `newDelimited(Buffer)` but set the `output` that will receive whole records which have been parsed.
`static RecordParser`	`newDelimited(Buffer delim, ReadStream<Buffer> stream)` Like `newDelimited(Buffer)` but wraps the `stream`.
`static RecordParser`	`newDelimited(String delim)` Create a new `RecordParser` instance, initially in delimited mode, and where the delimiter can be represented by the String delim endcoded in latin-1 .
`static RecordParser`	`newDelimited(String delim, Handler<Buffer> output)` Like `newDelimited(String)` but set the `output` that will receive whole records which have been parsed.
`static RecordParser`	`newDelimited(String delim, ReadStream<Buffer> stream)` Like `newDelimited(String)` but wraps the `stream`.
`static RecordParser`	`newFixed(int size)` Create a new `RecordParser` instance, initially in fixed size mode, and where the record size is specified by the `size` parameter.
`static RecordParser`	`newFixed(int size, Handler<Buffer> output)` Like `newFixed(int)` but set the `output` that will receive whole records which have been parsed.
`static RecordParser`	`newFixed(int size, ReadStream<Buffer> stream)` Like `newFixed(int)` but wraps the `stream`.
`RecordParser`	`pause()` Pause the `ReadStream`, it sets the buffer in `fetch` mode and clears the actual demand.
`RecordParser`	`resume()` Resume reading, and sets the buffer in `flowing` mode.
`void`	`setOutput(Handler<Buffer> output)`

Methods inherited from interface io.vertx.core.streams.ReadStream
pipe, pipeTo, pipeTo

- Method Detail
  - setOutput
```
void setOutput(Handler<Buffer> output)
```
  - newDelimited
```
static RecordParser newDelimited(String delim,
                                 Handler<Buffer> output)
```
    Like newDelimited(String) but set the output that will receive whole records which have been parsed.
    
    Parameters:
    
    delim - the initial delimiter string
    
    output - handler that will receive the output
  - newDelimited
```
static RecordParser newDelimited(String delim,
                                 ReadStream<Buffer> stream)
```
    Like newDelimited(String) but wraps the stream. The stream handlers will be set/unset when the handler(Handler) is set.
    The pause()/resume() operations are propagated to the stream.
    
    Parameters:
    
    delim - the initial delimiter string
    
    stream - the wrapped stream
  - newDelimited
```
static RecordParser newDelimited(String delim)
```
    Create a new RecordParser instance, initially in delimited mode, and where the delimiter can be represented by the String delim endcoded in latin-1 . Don't use this if your String contains other than latin-1 characters.
    output Will receive whole records which have been parsed.
    
    Parameters:
    
    delim - the initial delimiter string
  - newDelimited
```
static RecordParser newDelimited(Buffer delim)
```
    Create a new RecordParser instance, initially in delimited mode, and where the delimiter can be represented by the Buffer delim.
    
    Parameters:
    
    delim - the initial delimiter buffer
  - newDelimited
```
static RecordParser newDelimited(Buffer delim,
                                 Handler<Buffer> output)
```
    Like newDelimited(Buffer) but set the output that will receive whole records which have been parsed.
    
    Parameters:
    
    delim - the initial delimiter buffer
    
    output - handler that will receive the output
  - newDelimited
```
static RecordParser newDelimited(Buffer delim,
                                 ReadStream<Buffer> stream)
```
    Like newDelimited(Buffer) but wraps the stream. The stream handlers will be set/unset when the handler(Handler) is set.
    The pause()/resume() operations are propagated to the stream.
    
    Parameters:
    
    delim - the initial delimiter buffer
    
    stream - the wrapped stream
  - newFixed
```
static RecordParser newFixed(int size)
```
    Create a new RecordParser instance, initially in fixed size mode, and where the record size is specified by the size parameter.
    output Will receive whole records which have been parsed.
    
    Parameters:
    
    size - the initial record size
  - newFixed
```
static RecordParser newFixed(int size,
                             Handler<Buffer> output)
```
    Like newFixed(int) but set the output that will receive whole records which have been parsed.
    
    Parameters:
    
    size - the initial record size
    
    output - handler that will receive the output
  - newFixed
```
static RecordParser newFixed(int size,
                             ReadStream<Buffer> stream)
```
    Like newFixed(int) but wraps the stream. The stream handlers will be set/unset when the handler(Handler) is set.
    The pause()/resume() operations are propagated to the stream.
    
    Parameters:
    
    size - the initial record size
    
    stream - the wrapped stream
  - delimitedMode
```
void delimitedMode(String delim)
```
    Flip the parser into delimited mode, and where the delimiter can be represented by the String delim encoded in latin-1 . Don't use this if your String contains other than latin-1 characters.
    This method can be called multiple times with different values of delim while data is being parsed.
    
    Parameters:
    
    delim - the new delimeter
  - delimitedMode
```
void delimitedMode(Buffer delim)
```
    Flip the parser into delimited mode, and where the delimiter can be represented by the delimiter delim.
    This method can be called multiple times with different values of delim while data is being parsed.
    
    Parameters:
    
    delim - the new delimiter
  - fixedSizeMode
```
void fixedSizeMode(int size)
```
    Flip the parser into fixed size mode, where the record size is specified by size in bytes.
    This method can be called multiple times with different values of size while data is being parsed.
    
    Parameters:
    
    size - the new record size
  - maxRecordSize
```
RecordParser maxRecordSize(int size)
```
    Set the maximum allowed size for a record when using the delimited mode. The delimiter itself does not count for the record size.
    If a record is longer than specified, an IllegalStateException will be thrown.
    
    Parameters:
    
    size - the maximum record size
    
    Returns:
    
    a reference to this, so the API can be used fluently
  - handle
```
void handle(Buffer buffer)
```
    This method is called to provide the parser with data.
    
    Specified by:
    
    handle in interface Handler<Buffer>
    
    Parameters:
    
    buffer - a chunk of data
  - exceptionHandler
```
RecordParser exceptionHandler(Handler<Throwable> handler)
```
    Description copied from interface: ReadStream
    
    Set an exception handler on the read stream.
    
    Specified by:
    
    exceptionHandler in interface ReadStream<Buffer>
    
    Specified by:
    
    exceptionHandler in interface StreamBase
    
    Parameters:
    
    handler - the exception handler
    
    Returns:
    
    a reference to this, so the API can be used fluently
  - handler
```
RecordParser handler(Handler<Buffer> handler)
```
    Description copied from interface: ReadStream
    
    Set a data handler. As data is read, the handler will be called with the data.
    
    Specified by:
    
    handler in interface ReadStream<Buffer>
    
    Returns:
    
    a reference to this, so the API can be used fluently
  - pause
```
RecordParser pause()
```
    Description copied from interface: ReadStream
    
    Pause the ReadStream, it sets the buffer in fetch mode and clears the actual demand.
    While it's paused, no data will be sent to the data handler.
    
    Specified by:
    
    pause in interface ReadStream<Buffer>
    
    Returns:
    
    a reference to this, so the API can be used fluently
  - fetch
```
RecordParser fetch(long amount)
```
    Description copied from interface: ReadStream
    
    Fetch the specified amount of elements. If the ReadStream has been paused, reading will recommence with the specified amount of items, otherwise the specified amount will be added to the current stream demand.
    
    Specified by:
    
    fetch in interface ReadStream<Buffer>
    
    Returns:
    
    a reference to this, so the API can be used fluently
  - resume
```
RecordParser resume()
```
    Description copied from interface: ReadStream
    
    Resume reading, and sets the buffer in flowing mode.
    If the ReadStream has been paused, reading will recommence on it.
    
    Specified by:
    
    resume in interface ReadStream<Buffer>
    
    Returns:
    
    a reference to this, so the API can be used fluently
  - endHandler
```
RecordParser endHandler(Handler<Void> endHandler)
```
    Description copied from interface: ReadStream
    
    Set an end handler. Once the stream has ended, and there is no more data to be read, this handler will be called.
    
    Specified by:
    
    endHandler in interface ReadStream<Buffer>
    
    Returns:
    
    a reference to this, so the API can be used fluently

Interface RecordParser

Method Summary

Methods inherited from interface io.vertx.core.streams.ReadStream

Method Detail

setOutput

newDelimited

newDelimited

newDelimited

newDelimited

newDelimited

newDelimited

newFixed

newFixed

newFixed

delimitedMode

delimitedMode

fixedSizeMode

maxRecordSize

handle

exceptionHandler

handler

pause

fetch

resume

endHandler