GroupSessionBuilder (client 0.15.0 API)

java.lang.Object
- org.signal.libsignal.protocol.groups.GroupSessionBuilder

```
public class GroupSessionBuilder
extends java.lang.Object
```
GroupSessionBuilder is responsible for setting up group SenderKey encrypted sessions. Once a session has been established, GroupCipher can be used to encrypt/decrypt messages in that session.
The built sessions are unidirectional: they can be used either for sending or for receiving, but not both. Sessions are constructed per (senderName + deviceId) tuple, with sending additionally parameterized on a per-group distributionId. Remote logical users are identified by their senderName, and each logical user can have multiple physical devices. This class is not thread-safe.

Constructor Summary

Constructors
Constructor Description

GroupSessionBuilder(SenderKeyStore senderKeyStore)

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`SenderKeyDistributionMessage`	`create(SignalProtocolAddress sender, java.util.UUID distributionId)`	Construct a group session for sending messages.
`void`	`process(SignalProtocolAddress sender, SenderKeyDistributionMessage senderKeyDistributionMessage)`	Construct a group session for receiving messages from sender.

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

- Constructor Detail
  - GroupSessionBuilder
```
public GroupSessionBuilder(SenderKeyStore senderKeyStore)
```
- Method Detail
  - process
```
public void process(SignalProtocolAddress sender,
                    SenderKeyDistributionMessage senderKeyDistributionMessage)
```
    Construct a group session for receiving messages from sender.
    
    Parameters:
    
    sender - The address of the device that sent the message.
    
    senderKeyDistributionMessage - A received SenderKeyDistributionMessage.
  - create
```
public SenderKeyDistributionMessage create(SignalProtocolAddress sender,
                                           java.util.UUID distributionId)
```
    Construct a group session for sending messages.
    
    Parameters:
    
    sender - The address of the current client.
    
    distributionId - An opaque identifier that uniquely identifies the group (but isn't the group ID).
    
    Returns:
    
    A SenderKeyDistributionMessage that is individually distributed to each member of the group.