Examples of com.amazonaws.services.simpleworkflow.flow.core.Settable

Package com.amazonaws.services.simpleworkflow.flow.core

Examples of com.amazonaws.services.simpleworkflow.flow.core.Settable

com.amazonaws.services.simpleworkflow.flow.core.Settable
It is an implementation of Promise, which exposes an additional {@link #set(Object)} and {@link #chain(Promise)} methods. Calling{@link #set(Object)} puts it in ready state, with value retrievable through{@link #get()} method. {@link #chain(Promise)} links state of this Settableto another Promise. When another promise changes its state to ready the chained one is also becomes ready.
Use settable.set(null) to set Settable<Void> to the ready state.
Settable is frequently used to return data from code contained in anonymous classes. For example:
```
  Promise<Integer> foo() { final Settable<Integer> result = new Settable<Integer>(); new TryCatch() { protected void doTry() throws Throwable { Promise<Integer> activity1Result = activities.callActivity1(); result.chain(activity1Result); } protected void doCatch(Throwable e) throws Throwable { Promise<Void> handled = handleFailure(e); rethrow(e, handled); } }; return result; }  
```
@param < V> The type of value accepted and returned by this Settable.Use {@link Void} to represent Promise that indicates completion ofoperation that doesn't return a value.

                if (!voidReturnType) {
                    if (!Promise.class.isAssignableFrom(returnType)) {
                        throw new IllegalArgumentException("Cannot decorate " + method.getName()
                                + " as its return type is not void or Promise");
                    }
                    result = new Settable();
                }
                this.method = method;
            }

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                Object r = swfWorkflowConsumer.processWorkflow(parameters, startTime, replaying);
                if (r instanceof Promise) {
                    methodResult.set((Promise) r);
                } else if (r != null) {
                    methodResult.set(new Settable(r));
                }
            }


            @Override
            protected void doCatch(Throwable e) throws Throwable {

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                if (!voidReturnType) {
                    if (!Promise.class.isAssignableFrom(returnType)) {
                        throw new IllegalArgumentException("Cannot decorate " + method.getName()
                                + " as its return type is not void or Promise");
                    }
                    result = new Settable();
                }
                this.method = method;
            }

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                if (!voidReturnType) {
                    if (!Promise.class.isAssignableFrom(returnType)) {
                        throw new IllegalArgumentException("Cannot decorate " + method.getName()
                                + " as its return type is not void or Promise");
                    }
                    result = new Settable();
                }
                this.method = method;
            }

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Related Classes of com.amazonaws.services.simpleworkflow.flow.core.Settable

com.amazonaws.services.simpleworkflow.flow.interceptors.RetryDecorator$DecoratorInvocationHandler$RetriedRunnable

org.apache.camel.component.aws.swf.CamelWorkflowDefinition

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