org.apache.commons.javaflow.examples.interceptor.Execution.java Source code

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Here is the source code for org.apache.commons.javaflow.examples.interceptor.Execution.java

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package org.apache.commons.javaflow.examples.interceptor;

import org.apache.commons.javaflow.api.InterceptorSupport;
import org.apache.commons.javaflow.api.ccs;
import org.apache.commons.javaflow.api.continuable;

public class Execution implements Runnable {

    @continuable
    public void run() {
        TargetInterface target = new TargetClass();
        // Need either @ccs on var or @continuable type
        @ccs
        InterceptorInterface interceptor = new InterceptorGuard(
                new TransactionalInterceptor(new SecurityInterceptor(target)));
        String[] array = new String[] { "A", "B", "C" };
        for (int i = 0; i < array.length; i++) {
            System.out.println("Execution " + i);
            interceptor.decorateCall(array[i]);
        }
    }

    // Guard is required to balance stack variables
    static class InterceptorGuard implements InterceptorInterface {
        final InterceptorInterface next;

        public InterceptorGuard(final InterceptorInterface next) {
            this.next = next;
        }

        public void decorateCall(String param) {
            InterceptorSupport.beforeExecution();
            try {
                // If there were no interceptors then we will have the following
                // call here:
                // TargetClass.execute(String) - this is what we pop-out above
                // with InterceptorSupport.beforeExecution();
                next.decorateCall(param);
            } finally {
                InterceptorSupport.afterExecution(this);
            }
        }
    }
}