Examples of org.jboss.gravia.runtime.ModuleActivator

org.jboss.gravia.runtime.ModuleActivator
Customizes the starting and stopping of a module.
{@code ModuleActivator} is an interface that may be implemented when a moduleis started or stopped. The Runtime can create instances of a module's {@code ModuleActivator} as required. If an instance's{@code ModuleActivator.start} method executes successfully, it is guaranteedthat the same instance's {@code ModuleActivator.stop} method will be calledwhen the module is to be stopped. The Runtime must not concurrently call a {@code ModuleActivator} object.
{@code ModuleActivator} is specified through the {@code Module-Activator}module header.
The specified {@code ModuleActivator} class must have a public constructorthat takes no parameters so that a {@code ModuleActivator} object can becreated by {@code Class.newInstance()}. @author thomas.diesler@jboss.com @since 27-Sep-2013 @NotThreadSafe

            try {
                Boolean graviaEnabled = Boolean.parseBoolean(getHeaders().get(Constants.GRAVIA_ENABLED));
                String moduleActivatorName = getHeaders().get(Constants.MODULE_ACTIVATOR);
                String bundleActivatorName = getHeaders().get("Bundle-Activator");
                if (moduleActivatorName != null || bundleActivatorName != null) {
                    ModuleActivator moduleActivator;
                    synchronized (MODULE_ACTIVATOR_KEY) {
                        moduleActivator = getAttachment(MODULE_ACTIVATOR_KEY);
                        if (moduleActivator == null) {
                            if (moduleActivatorName != null) {
                                Object result = loadClass(moduleActivatorName).newInstance();
                                moduleActivator = (ModuleActivator) result;
                                putAttachment(MODULE_ACTIVATOR_KEY, moduleActivator);
                            } else if (bundleActivatorName != null && graviaEnabled) {
                                Object result = loadClass(bundleActivatorName).newInstance();
                                moduleActivator = new ModuleActivatorBridge((BundleActivator) result);
                                putAttachment(MODULE_ACTIVATOR_KEY, moduleActivator);
                            }
                        }
                    }
                    if (moduleActivator != null) {
                        moduleActivator.start(getModuleContext());
                    }
                }
            }


            // If the {@code ModuleActivator} is invalid or throws an exception then:

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            eventHandler.fireModuleEvent(this, ModuleEvent.STOPPING);


            // #5 The {@link ModuleActivator#stop(ModuleContext)} is called
            Throwable stopException = null;
            try {
                ModuleActivator moduleActivator = getAttachment(MODULE_ACTIVATOR_KEY);
                if (moduleActivator != null) {
                    moduleActivator.stop(getModuleContext());
                }
            } catch (Throwable th) {
                stopException = th;
            }

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            // #5 The {@link ModuleActivator#start(ModuleContext)} method if one is specified, is called.
            try {
                String className = getHeaders().get(Constants.MODULE_ACTIVATOR);
                if (className != null) {
                    ModuleActivator moduleActivator;
                    synchronized (MODULE_ACTIVATOR_KEY) {
                        moduleActivator = getAttachment(MODULE_ACTIVATOR_KEY);
                        if (moduleActivator == null) {
                            Object result = loadClass(className).newInstance();
                            moduleActivator = (ModuleActivator) result;
                            putAttachment(MODULE_ACTIVATOR_KEY, moduleActivator);
                        }
                    }
                    if (moduleActivator != null) {
                        moduleActivator.start(getModuleContext());
                    }
                }
            }


            // If the {@code ModuleActivator} is invalid or throws an exception then:

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            eventHandler.fireModuleEvent(this, ModuleEvent.STOPPING);


            // #5 The {@link ModuleActivator#stop(ModuleContext)} is called
            Throwable stopException = null;
            try {
                ModuleActivator moduleActivator = getAttachment(MODULE_ACTIVATOR_KEY);
                if (moduleActivator != null) {
                    moduleActivator.stop(getModuleContext());
                }
            } catch (Throwable th) {
                stopException = th;
            }

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            try {
                Boolean graviaEnabled = Boolean.parseBoolean(getHeaders().get(Constants.GRAVIA_ENABLED));
                String moduleActivatorName = getHeaders().get(Constants.MODULE_ACTIVATOR);
                String bundleActivatorName = getHeaders().get("Bundle-Activator");
                if (moduleActivatorName != null || bundleActivatorName != null) {
                    ModuleActivator moduleActivator;
                    synchronized (MODULE_ACTIVATOR_KEY) {
                        moduleActivator = getAttachment(MODULE_ACTIVATOR_KEY);
                        if (moduleActivator == null) {
                            if (moduleActivatorName != null) {
                                Object result = loadClass(moduleActivatorName).newInstance();
                                moduleActivator = (ModuleActivator) result;
                                putAttachment(MODULE_ACTIVATOR_KEY, moduleActivator);
                            } else if (bundleActivatorName != null && graviaEnabled) {
                                Object result = loadClass(bundleActivatorName).newInstance();
                                moduleActivator = new ModuleActivatorBridge((BundleActivator) result);
                                putAttachment(MODULE_ACTIVATOR_KEY, moduleActivator);
                            }
                        }
                    }
                    if (moduleActivator != null) {
                        moduleActivator.start(getModuleContext());
                    }
                }
            }


            // If the {@code ModuleActivator} is invalid or throws an exception then:

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            eventHandler.fireModuleEvent(this, ModuleEvent.STOPPING);


            // #5 The {@link ModuleActivator#stop(ModuleContext)} is called
            Throwable stopException = null;
            try {
                ModuleActivator moduleActivator = getAttachment(MODULE_ACTIVATOR_KEY);
                if (moduleActivator != null) {
                    moduleActivator.stop(getModuleContext());
                }
            } catch (Throwable th) {
                stopException = th;
            }

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            // #5 The {@link ModuleActivator#start(ModuleContext)} method if one is specified, is called.
            try {
                String className = getHeaders().get(Constants.MODULE_ACTIVATOR);
                if (className != null) {
                    ModuleActivator moduleActivator;
                    synchronized (MODULE_ACTIVATOR_KEY) {
                        moduleActivator = getAttachment(MODULE_ACTIVATOR_KEY);
                        if (moduleActivator == null) {
                            Object result = loadClass(className).newInstance();
                            moduleActivator = (ModuleActivator) result;
                            putAttachment(MODULE_ACTIVATOR_KEY, moduleActivator);
                        }
                    }
                    if (moduleActivator != null) {
                        moduleActivator.start(getModuleContext());
                    }
                }
            }


            // If the {@code ModuleActivator} is invalid or throws an exception then:

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            eventHandler.fireModuleEvent(this, ModuleEvent.STOPPING);


            // #5 The {@link ModuleActivator#stop(ModuleContext)} is called
            Throwable stopException = null;
            try {
                ModuleActivator moduleActivator = getAttachment(MODULE_ACTIVATOR_KEY);
                if (moduleActivator != null) {
                    moduleActivator.stop(getModuleContext());
                }
            } catch (Throwable th) {
                stopException = th;
            }

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Related Classes of org.jboss.gravia.runtime.ModuleActivator

org.jboss.gravia.runtime.embedded.internal.EmbeddedModule

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