com.hazelcast.cp.internal.raftop.metadata

Class CreateRaftGroupOp

java.lang.Object

com.hazelcast.cp.internal.RaftOp

com.hazelcast.cp.internal.raftop.metadata.MetadataRaftGroupOp

com.hazelcast.cp.internal.raftop.metadata.CreateRaftGroupOp

All Implemented Interfaces:

IndeterminateOperationStateAware, DataSerializable, IdentifiedDataSerializable

public class CreateRaftGroupOp
extends MetadataRaftGroupOp
implements IndeterminateOperationStateAware, IdentifiedDataSerializable

Creates a new Raft group with the given name and the members and returns its ID. Expected number of members for the Raft group is validated via the Hazelcast configuration. Number of members in the operation are expected to be same with the Raft group member count in the configuration. If an active Raft group exists for the same name, we check if the Raft group contains the same number of members. If group size is same, we return ID of the existing Raft group. Otherwise, we fail with IllegalStateException and this exception will be exposed to the user. If a member in the given member list is not an active CP member, the operation fails with CannotCreateRaftGroupException. This exception will be handled by RaftInvocationManager and another attempt will be made with a new member list.

This operation is committed to the Metadata group.

Constructor Summary

Constructors

Constructor and Description
CreateRaftGroupOp()
CreateRaftGroupOp(String groupName, Collection<CPMemberInfo> members)

Method Summary

Modifier and Type	Method and Description
int	getFactoryId() Returns DataSerializableFactory factory ID for this class.
int	getId() Returns type identifier for this class.
boolean	isRetryableOnIndeterminateOperationState() Returns true if duplicate commit of the operation is equivalent to committing it only once.
void	readData(ObjectDataInput in) Reads fields from the input stream
Object	run(MetadataRaftGroupManager metadataGroupManager, long commitIndex)
protected void	toString(StringBuilder sb)
void	writeData(ObjectDataOutput out) Writes object fields to output stream

Methods inherited from class com.hazelcast.cp.internal.raftop.metadata.MetadataRaftGroupOp

getServiceName, run

Methods inherited from class com.hazelcast.cp.internal.RaftOp

getLogger, getNodeEngine, getService, logFailure, setNodeEngine, toString

Methods inherited from class java.lang.Object

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

Constructor Detail

CreateRaftGroupOp

public CreateRaftGroupOp()

CreateRaftGroupOp

public CreateRaftGroupOp(String groupName,
                         Collection<CPMemberInfo> members)

Method Detail

run

public Object run(MetadataRaftGroupManager metadataGroupManager,
                  long commitIndex)

Specified by:

run in class MetadataRaftGroupOp

isRetryableOnIndeterminateOperationState

public boolean isRetryableOnIndeterminateOperationState()

Description copied from interface: IndeterminateOperationStateAware

Returns true if duplicate commit of the operation is equivalent to committing it only once.

Specified by:

isRetryableOnIndeterminateOperationState in interface IndeterminateOperationStateAware

getFactoryId

public int getFactoryId()

Description copied from interface: IdentifiedDataSerializable

Returns DataSerializableFactory factory ID for this class.

Specified by:

getFactoryId in interface IdentifiedDataSerializable

Returns:

factory ID

getId

public int getId()

Description copied from interface: IdentifiedDataSerializable

Returns type identifier for this class. It should be unique per DataSerializableFactory.

Specified by:

getId in interface IdentifiedDataSerializable

Returns:

type ID

writeData

public void writeData(ObjectDataOutput out)
               throws IOException

Description copied from interface: DataSerializable

Writes object fields to output stream

Specified by:

writeData in interface DataSerializable

Parameters:

out - output

Throws:

IOException - if an I/O error occurs. In particular, an IOException may be thrown if the output stream has been closed.

readData

public void readData(ObjectDataInput in)
              throws IOException

Description copied from interface: DataSerializable

Reads fields from the input stream

Specified by:

readData in interface DataSerializable

Parameters:

in - input

Throws:

IOException - if an I/O error occurs. In particular, an IOException may be thrown if the input stream has been closed.

toString

protected void toString(StringBuilder sb)

Overrides:

toString in class RaftOp