Examples of org.camunda.bpm.engine.impl.interceptor.CommandContextInterceptor

Package org.camunda.bpm.engine.impl.interceptor

Examples of org.camunda.bpm.engine.impl.interceptor.CommandContextInterceptor

org.camunda.bpm.engine.impl.interceptor.CommandContextInterceptor

Interceptor used for opening the {@link CommandContext} and {@link CommandInvocationContext}.

Since 7.1, this interceptor will not always open a new command context but instead reuse an existing command context if possible. This is required for supporting process engine public API access from delegation code (see {@link ProcessEngineServicesAware}.). However, for every command, a new command invocation context is created. While a command context holds resources that are shared between multiple commands, such as database sessions, a command invocation context holds resources specific for a single command.

The interceptor will check whether an open command context exists. If true, it will reuse the command context. If false, it will open a new one. We will always push the context to the {@link Context} stack. So ins some situations, you will see the same context being pushed to the sackmultiple times. The rationale is that the size of the stack should allow you to determine whether you are currently running an 'inner' command or an 'outer' command as well as your current stack size. Existing code may rely on this behavior.

The interceptor can be configured using the property {@link #alwaysOpenNew}. If this property is set to true, we will always open a new context regardless whether there already exists an active context or not. This is required for properly supporting REQUIRES_NEW semantics for commands run through the {@link ProcessEngineConfigurationImpl#getCommandInterceptorsTxRequiresNew()}chain. In that context the 'inner' command must be able to succeed / fail independently from the 'outer' command.
@author Tom Baeyens @author Daniel Meyer @author Thorben Lindhauer

    }


    List<CommandInterceptor> defaultCommandInterceptorsTxRequired = new ArrayList<CommandInterceptor>();
    defaultCommandInterceptorsTxRequired.add(new LogInterceptor());
    defaultCommandInterceptorsTxRequired.add(new SpringTransactionInterceptor(transactionManager, TransactionTemplate.PROPAGATION_REQUIRED));
    CommandContextInterceptor commandContextInterceptor = new CommandContextInterceptor(commandContextFactory, this);
    defaultCommandInterceptorsTxRequired.add(commandContextInterceptor);
    return defaultCommandInterceptorsTxRequired;
  }

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  protected Collection< ? extends CommandInterceptor> getDefaultCommandInterceptorsTxRequiresNew() {
    List<CommandInterceptor> defaultCommandInterceptorsTxRequiresNew = new ArrayList<CommandInterceptor>();
    defaultCommandInterceptorsTxRequiresNew.add(new LogInterceptor());
    defaultCommandInterceptorsTxRequiresNew.add(new SpringTransactionInterceptor(transactionManager, TransactionTemplate.PROPAGATION_REQUIRES_NEW));
    CommandContextInterceptor commandContextInterceptor = new CommandContextInterceptor(commandContextFactory, this, true);
    defaultCommandInterceptorsTxRequiresNew.add(commandContextInterceptor);
    return defaultCommandInterceptorsTxRequiresNew;
  }

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  @Override
  protected Collection< ? extends CommandInterceptor> getDefaultCommandInterceptorsTxRequired() {
    List<CommandInterceptor> defaultCommandInterceptorsTxRequired = new ArrayList<CommandInterceptor>();
    defaultCommandInterceptorsTxRequired.add(new LogInterceptor());
    defaultCommandInterceptorsTxRequired.add(new JtaTransactionInterceptor(transactionManager, false));
    defaultCommandInterceptorsTxRequired.add(new CommandContextInterceptor(commandContextFactory, this));
    return defaultCommandInterceptorsTxRequired;
  }

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  @Override
  protected Collection< ? extends CommandInterceptor> getDefaultCommandInterceptorsTxRequiresNew() {
    List<CommandInterceptor> defaultCommandInterceptorsTxRequiresNew = new ArrayList<CommandInterceptor>();
    defaultCommandInterceptorsTxRequiresNew.add(new LogInterceptor());
    defaultCommandInterceptorsTxRequiresNew.add(new JtaTransactionInterceptor(transactionManager, true));
    defaultCommandInterceptorsTxRequiresNew.add(new CommandContextInterceptor(commandContextFactory, this, true));
    return defaultCommandInterceptorsTxRequiresNew;
  }

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  @Override
  protected void initCommandExecutorDbSchemaOperations() {
    if(commandExecutorSchemaOperations == null) {
      List<CommandInterceptor> commandInterceptorsDbSchemaOperations = new ArrayList<CommandInterceptor>();
      commandInterceptorsDbSchemaOperations.add(new LogInterceptor());
      commandInterceptorsDbSchemaOperations.add(new CommandContextInterceptor(dbSchemaOperationsCommandContextFactory, this));
      commandInterceptorsDbSchemaOperations.add(actualCommandExecutor);
      commandExecutorSchemaOperations = initInterceptorChain(commandInterceptorsDbSchemaOperations);
    }
  }

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public class StandaloneProcessEngineConfiguration extends ProcessEngineConfigurationImpl {


  protected Collection< ? extends CommandInterceptor> getDefaultCommandInterceptorsTxRequired() {
    List<CommandInterceptor> defaultCommandInterceptorsTxRequired = new ArrayList<CommandInterceptor>();
    defaultCommandInterceptorsTxRequired.add(new LogInterceptor());
    defaultCommandInterceptorsTxRequired.add(new CommandContextInterceptor(commandContextFactory, this));
    return defaultCommandInterceptorsTxRequired;
  }

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  }


  protected Collection< ? extends CommandInterceptor> getDefaultCommandInterceptorsTxRequiresNew() {
    List<CommandInterceptor> defaultCommandInterceptorsTxRequired = new ArrayList<CommandInterceptor>();
    defaultCommandInterceptorsTxRequired.add(new LogInterceptor());
    defaultCommandInterceptorsTxRequired.add(new CommandContextInterceptor(commandContextFactory, this, true));
    return defaultCommandInterceptorsTxRequired;
  }

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Related Classes of org.camunda.bpm.engine.impl.interceptor.CommandContextInterceptor

org.camunda.bpm.engine.impl.cfg.JtaProcessEngineConfiguration

org.camunda.bpm.engine.impl.cfg.StandaloneProcessEngineConfiguration

org.camunda.bpm.engine.spring.SpringProcessEngineConfiguration

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