I2NPMessageHandler (I2P Anonymous Network - Java Documentation - Version 1.5.0)

java.lang.Object
- net.i2p.data.i2np.I2NPMessageHandler

```
public class I2NPMessageHandler
extends Object
```
Handle messages from router to router. This class is NOT threadsafe

Constructor Summary

Constructors
Constructor Description

I2NPMessageHandler(I2PAppContext context)

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`I2NPMessage`	`lastRead()`	clear the last message read from a byte array with an offset
`I2NPMessage`	`readMessage(byte[] data)`	Read an I2NPMessage from the byte array and return the fully populated object.
`int`	`readMessage(byte[] data, int offset)`	Result is retreived with lastRead()
`int`	`readMessage(byte[] data, int offset, int maxLen)`	Set a limit on the max to read from the data buffer, so that we can use a large buffer but prevent the reader from reading off the end.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - I2NPMessageHandler
```
public I2NPMessageHandler(I2PAppContext context)
```
- Method Detail
  - lastRead
```
public I2NPMessage lastRead()
```
    clear the last message read from a byte array with an offset
  - readMessage
```
public I2NPMessage readMessage(byte[] data)
                        throws I2NPMessageException
```
    Read an I2NPMessage from the byte array and return the fully populated object.
    
    Throws:
    
    I2NPMessageException - if there is a problem handling the particular message - if it is an unknown type or has improper formatting, etc.
  - readMessage
```
public int readMessage(byte[] data,
                       int offset)
                throws I2NPMessageException
```
    Result is retreived with lastRead()
    
    Throws:
    
    I2NPMessageException
  - readMessage
```
public int readMessage(byte[] data,
                       int offset,
                       int maxLen)
                throws I2NPMessageException
```
    Set a limit on the max to read from the data buffer, so that we can use a large buffer but prevent the reader from reading off the end. Result is retreived with lastRead()
    
    Parameters:
    
    maxLen - read no more than this many bytes from data starting at offset, even if it is longer must be at least 16
    
    Throws:
    
    I2NPMessageException
    
    Since:
    
    0.8.12