[#PETALSCDK-26] Enhance Exception Handling for lifecycle operations in AbstractComponent - Petals Link JIRA

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Type: Improvement Request
Status: Resolved
Priority: Major
Resolution: Fixed
Affects Version/s: 5.1
Fix Version/s: 5.6.0
Component/s: None
Security Level: Public

Description:

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In the AbstractComponent, lifecycle operations contain atomic calls to which all throws Exceptions. These exceptions are not handled atomically but globally with a single catch block. If one atomic operation fails, the next ones will never be called and the component can be in a inconcistent state or some resources will potentially never be released.
For example look at the stop method :

public final void stop() throws JBIException {
        this.logger.info("Stop component...");
        try {
            this.logger.fine("Calling specific stop...");
            this.doStop();
            this.logger.fine("Specific stop done.");
        } finally {
            this.notificationService.stop();
            this.deactivateServiceEndpointList();
            this.unregisterRuntimeConfigurationMBean();
            this.unregisterInterceptorManagerMBean();
            // stop first the acceptor Manager as it aggregates the worker
            // manager
            this.acceptorManager.stop();
            this.processorManager.stop();
            this.asyncManager.stop();
        }
        this.logger.info("Component stopped");
    }

What happens if "this.notificationService.stop();" throws an exception?

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In the AbstractComponent, lifecycle operations contain atomic calls to which all throws Exceptions. These exceptions are not handled atomically but globally with a single catch block. If one atomic operation fails, the next ones will never be called and the component can be in a inconcistent state or some resources will potentially never be released. For example look at the stop method :

public final void stop() throws JBIException {
        this.logger.info("Stop component...");
        try {
            this.logger.fine("Calling specific stop...");
            this.doStop();
            this.logger.fine("Specific stop done.");
        } finally {
            this.notificationService.stop();
            this.deactivateServiceEndpointList();
            this.unregisterRuntimeConfigurationMBean();
            this.unregisterInterceptorManagerMBean();
            // stop first the acceptor Manager as it aggregates the worker
            // manager
            this.acceptorManager.stop();
            this.processorManager.stop();
            this.asyncManager.stop();
        }
        this.logger.info("Component stopped");
    }

What happens if "this.notificationService.stop();" throws an exception?

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Victor NOËL added a comment - Mon, 12 Sep 2016 - 10:56:40 +0200

This was fixed with ~~PETALSDISTRIB-240~~ in 5.6.0.

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Victor NOËL added a comment - Mon, 12 Sep 2016 - 10:56:40 +0200 This was fixed with ~~PETALSDISTRIB-240~~ in 5.6.0.

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Victor NOËL added a comment - Mon, 5 Oct 2015 - 11:26:57 +0200

Moreover, we should never have methods that throw exceptions in a finally block.

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Victor NOËL added a comment - Mon, 5 Oct 2015 - 11:26:57 +0200 Moreover, we should never have methods that throw exceptions in a finally block.

Petals CDK

Enhance Exception Handling for lifecycle operations in AbstractComponent

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