How to use org.camunda.bpm.engine.impl.cfg

public CommandContext(ProcessEngineConfigurationImpl processEngineConfiguration, TransactionContextFactory transactionContextFactory) {
 this.processEngineConfiguration = processEngineConfiguration;
 this.failedJobCommandFactory = processEngineConfiguration.getFailedJobCommandFactory();
 sessionFactories = processEngineConfiguration.getSessionFactories();
 this.transactionContext = transactionContextFactory.openTransactionContext(this);
 this.restrictUserOperationLogToAuthenticatedUsers = processEngineConfiguration.isRestrictUserOperationLogToAuthenticatedUsers();
}

public void beforeCompletion() {
 if(TransactionState.COMMITTING.equals(transactionState)
   || TransactionState.ROLLINGBACK.equals(transactionState)) {
  transactionListener.execute(commandContext);
 }
}

protected void init() {
 initTransactionManager();
 initDbSchemaOperationsCommandContextFactory();
 super.init();
}

protected void invokePreInit() {
 for (ProcessEnginePlugin plugin : processEnginePlugins) {
  LOG.pluginActivated(plugin.toString(), getProcessEngineName());
  plugin.preInit(this);
 }
}

@Override
public void postInit(ProcessEngineConfigurationImpl processEngineConfiguration) {
 for (ProcessEnginePlugin plugin : plugins) {
  plugin.postInit(processEngineConfiguration);
 }
}

 @Override
 public void afterCommit() {
  transactionListener.execute(commandContext);
 }
});

protected void initCommandExecutorTxRequired() {
 if (commandExecutorTxRequired == null) {
  commandExecutorTxRequired = initInterceptorChain(commandInterceptorsTxRequired);
 }
}

/**
 * Creates a new {@link BpmnParse} instance that can be used
 * to parse only one BPMN 2.0 process definition.
 */
public BpmnParse createParse() {
 return bpmnParseFactory.createBpmnParse(this);
}

 public ProcessEngineConfiguration configureEngine(ProcessEngineConfigurationImpl configuration) {
  configuration.setJavaSerializationFormatEnabled(true);
  return configuration;
 }
};

public CommandContext(ProcessEngineConfigurationImpl processEngineConfiguration, TransactionContextFactory transactionContextFactory) {
 this.processEngineConfiguration = processEngineConfiguration;
 this.failedJobCommandFactory = processEngineConfiguration.getFailedJobCommandFactory();
 sessionFactories = processEngineConfiguration.getSessionFactories();
 this.transactionContext = transactionContextFactory.openTransactionContext(this);
 this.restrictUserOperationLogToAuthenticatedUsers = processEngineConfiguration.isRestrictUserOperationLogToAuthenticatedUsers();
}

protected void invokePreInit() {
 for (ProcessEnginePlugin plugin : processEnginePlugins) {
  LOG.pluginActivated(plugin.toString(), getProcessEngineName());
  plugin.preInit(this);
 }
}

public void afterCompletion(int status) {
 if(Status.STATUS_ROLLEDBACK == status && TransactionState.ROLLED_BACK.equals(transactionState)) {
  transactionListener.execute(commandContext);
 } else if(Status.STATUS_COMMITTED == status && TransactionState.COMMITTED.equals(transactionState)) {
  transactionListener.execute(commandContext);
 }
}

protected void init() {
 initTransactionManager();
 initDbSchemaOperationsCommandContextFactory();
 super.init();
}

protected void invokePostInit() {
 for (ProcessEnginePlugin plugin : processEnginePlugins) {
  plugin.postInit(this);
 }
}

 @Override
 public void beforeCompletion() {
  transactionListener.execute(commandContext);
 }
});

 public ProcessEngineConfiguration configureEngine(ProcessEngineConfigurationImpl configuration) {
  configuration.setJavaSerializationFormatEnabled(true);
  return configuration;
 }
};

public void beforeCompletion() {
 if(TransactionState.COMMITTING.equals(transactionState)
   || TransactionState.ROLLINGBACK.equals(transactionState)) {
  transactionListener.execute(commandContext);
 }
}

protected void invokePostInit() {
 for (ProcessEnginePlugin plugin : processEnginePlugins) {
  plugin.postInit(this);
 }
}

 public ProcessEngineConfiguration configureEngine(ProcessEngineConfigurationImpl configuration) {
  configuration.setJavaSerializationFormatEnabled(true);
  return configuration;
 }
};

public void afterCompletion(int status) {
 if(Status.STATUS_ROLLEDBACK == status && TransactionState.ROLLED_BACK.equals(transactionState)) {
  transactionListener.execute(commandContext);
 } else if(Status.STATUS_COMMITTED == status && TransactionState.COMMITTED.equals(transactionState)) {
  transactionListener.execute(commandContext);
 }
}