/**
* consume
* Discriminate the command handler
* Called by the core.
* @param command
* @throws PlanckDBException
*/
public void consume(Command command)
{
Int32 type=command.getCommandType();
switch (type){
case PlanckDBConstants.CREATE_NEW_ENTITY:handleNewItemCommand( command);break;
case PlanckDBConstants.DELETE_ENTITY:handleRemoveItemCommand(command);break;
case PlanckDBConstants.ADD_CHILD_ENTITY_TO_PARENT_ENTITY: handleAddChildToParent(command);break;
case PlanckDBConstants.REMOVE_CHILD_ENTITY_FROM_PARENT_ENTITY:handleRemoveChildFromParent(command);break;
case PlanckDBConstants.UPDATE_ENTITY: handleUpdateNodeCommand(command);break;
case PlanckDBConstants.LOCK_ENTITY:handleLockItemCommand(command);break;
case PlanckDBConstants.ADD_ATTRIBUTE:handleAddAttributeCommand(command);break;
case PlanckDBConstants.REMOVE_ATTRIBUTE:handleRemoveAttributeCommand(command);break;
}
int entityId=command.getEntityId();
int? commandSchemaId=command.GetSchemaId();
foreach (Transaction transaction in transactions) {
if(commandSchemaId!=transaction.schemaId()){
transaction.getDirtySet().Add(entityId);
}
}
}
public Command revertCommand(Command command)
{
int commandType=command.getCommandType();
Int32 entityId = command.getEntityId();
Int32 childEntityId = command.getChildEntityId();
Int32 schemaId=(Int32)command.GetSchemaId();
Int32 coreManagerId=command.GetCoreManagerKey();
Int32 sessionId=command.GetSessionId();
bool lockEntity=command.getLock();
bool oldLock=command.getOldLock();
NodeAttribute[] oldAttributes=command.getOldAttributes();
NodeAttribute[] attributes=command.getAttributes();
byte[] arcName=command.getArcName();
long lockTimeout=command.getLockTimeOut();
switch (commandType){
case PlanckDBConstants.CREATE_NEW_ENTITY:{
return buildDeleteNode(entityId,lockEntity,schemaId,coreManagerId,sessionId, lockTimeout, attributes);
}
case PlanckDBConstants.DELETE_ENTITY:{
Command newCommand= buildCreateNode(oldLock,schemaId,coreManagerId,sessionId, lockTimeout, oldAttributes);
newCommand.Push(PlanckDBConstants.ENTITY_ID, PlanckDBConstants.INTEGER,entityId);
return newCommand;
}
case PlanckDBConstants.ADD_CHILD_ENTITY_TO_PARENT_ENTITY:{
return buildRemoveChildFromParentNode(entityId,arcName,childEntityId,schemaId,coreManagerId,sessionId, lockTimeout);
}
case PlanckDBConstants.REMOVE_CHILD_ENTITY_FROM_PARENT_ENTITY:{
return buildAddChildToParentNode(entityId,childEntityId,arcName,schemaId,coreManagerId,sessionId, lockTimeout);
}
case PlanckDBConstants.UPDATE_ENTITY:{
Command newCommand = buildUpdateNode(entityId, schemaId, coreManagerId, sessionId, lockTimeout, attributes);
newCommand.Push(PlanckDBConstants.OLD_ATTRIBUTES, PlanckDBConstants.ATTRIBUTE_MAP,oldAttributes);
return newCommand;
}
case PlanckDBConstants.ADD_ATTRIBUTE:{
return buildRemoveAttributes(entityId,schemaId,coreManagerId,sessionId,lockTimeout,attributes);
}
case PlanckDBConstants.REMOVE_ATTRIBUTE:{
return buildAddAttributes(entityId,schemaId,coreManagerId,sessionId, lockTimeout, oldAttributes);
}
}
throw new PlanckDBException("unsupported state the should not reach to this point of the code");
}
/**
* this is the heart of the storage,<p>
* It control all the in coming commands.<p>
* The method does the following<p>
* 1. validate the command<p>
* 2. update the version number and the conflict number (if needed)<p>
* 3. push the command to the command queue<p>
*/
public void consume(Command command)
{
// update schema and coreManagerKey in command in case that the schema or coreManagerKey fields in the command are null
if(command.GetSchemaId()<0){
command.setSchemaId(getSessionMetaData().getSchemaId());
}
if(command.GetCoreManagerKey()==null){
command.setCoreManagerKey(getCoreManager().getKey());
}
// you do not have to handle your messages which NetworkProtocolType is multicast
// because you have already handle them
NetworkProtocolType type = command.getNetworkProtocolType();
if(type!=null && isCast(type) && command.GetCoreManagerKey().Equals(getCoreManager().getKey())&&sessionMetaData.GetSessionId()==command.GetSessionId()){
return;
}
//TODO validate message
if(command.isModeCommand()||command.isAtomicModelCommand()){ // model change commands
// set version number or distribute
if(command.getVersion()<0){
distributionManager.produceTcp(command);
int version = command.getVersion();
// return if command is lock or something was wrong
if(version<0|| command.isNotSucceed()){
return;
}
}
if(command.isAtomicModelCommand()){
List<Command> commands = command.getCommands();
atomicContainer.register(command,commands);
foreach (Command newCommand in commands) {
commandQueue.pushCommand(newCommand);
}
}else{
commandQueue.pushCommand(command);
}
}else{
Int32 commandType = command.getCommandType();
if(commandType==PlanckDBConstants.READ_LOCK_COMMAND){
if( ! command.GetCoreManagerKey().Equals(coreManager.getKey())){
List<Command> commands=command.getCommands();
bool entityLock=command.isLocked();
foreach (Command newCommand in commands) {
int entityId=newCommand.getEntityId();
int ownerId=newCommand.getOwnerId();
if(entityLock){
registry.lockEntity(entityId,true,ownerId);
}else{
registry.lockEntity(entityId,false,PlanckDBConstants.NON_ENTITY_OWNER);
}
}
}else{
distributionManager.produceTcp(command);
}
}
}
}
