How to use

MethodExecutionAction

in

com.netflix.hystrix.contrib.javanica.command

private CommandAction createCommandAction(MetaHolder metaHolder) {
  return new MethodExecutionAction(metaHolder.getObj(), metaHolder.getMethod(), metaHolder.getArgs(), metaHolder);
}

/**
 * Invokes the method. Also private method also can be invoked.
 *
 * @return result of execution
 */
@Override
public Object executeWithArgs(ExecutionType executionType, Object[] args) throws CommandActionExecutionException {
  if(ExecutionType.ASYNCHRONOUS == executionType){
    Closure closure = AsyncClosureFactory.getInstance().createClosure(metaHolder, method, object, args);
    return executeClj(closure.getClosureObj(), closure.getClosureMethod());
  }
  return execute(object, method, args);
}

@Override
public Object execute(ExecutionType executionType) throws CommandActionExecutionException {
  return executeWithArgs(executionType, _args);
}

private Object executeClj(Object o, Method m, Object... args){
  Object result = null;
  try {
    m.setAccessible(true); // suppress Java language access
    result = m.invoke(o, args);
  } catch (IllegalAccessException e) {
    propagateCause(e);
  } catch (InvocationTargetException e) {
    propagateCause(e);
  }
  return result;
}

/**
 * Gets method name to be used to get a key for request caching.
 *
 * @return method name
 */
public String getCacheKeyMethodName() {
  return cacheKeyMethod != null ? cacheKeyMethod.getMethod().getName() : null;
}

public HystrixGeneratedCacheKey generateCacheKey(CacheInvocationContext<? extends Annotation> cacheInvocationContext) throws HystrixCacheKeyGenerationException {
  MethodExecutionAction cacheKeyMethod = cacheInvocationContext.getCacheKeyMethod();
  if (cacheKeyMethod != null) {
    try {
      return new DefaultHystrixGeneratedCacheKey((String) cacheKeyMethod.execute(cacheInvocationContext.getExecutionType()));
    } catch (Throwable throwable) {
      throw new HystrixCacheKeyGenerationException(throwable);
    }
  } else {
    if (cacheInvocationContext.hasKeyParameters()) {
      StringBuilder cacheKeyBuilder = new StringBuilder();
      for (CacheInvocationParameter parameter : cacheInvocationContext.getKeyParameters()) {
        CacheKey cacheKey = parameter.getCacheKeyAnnotation();
        if (cacheKey != null && StringUtils.isNotBlank(cacheKey.value())) {
          appendPropertyValue(cacheKeyBuilder, Arrays.asList(StringUtils.split(cacheKey.value(), ".")), parameter.getValue());
        } else {
          cacheKeyBuilder.append(parameter.getValue());
        }
      }
      return new DefaultHystrixGeneratedCacheKey(cacheKeyBuilder.toString());
    } else {
      return DefaultHystrixGeneratedCacheKey.EMPTY;
    }
  }
}

/**
 * Invokes the method.
 *
 * @return result of execution
 */
private Object execute(Object o, Method m, Object... args) throws CommandActionExecutionException {
  Object result = null;
  try {
    m.setAccessible(true); // suppress Java language access
    if (isCompileWeaving() && metaHolder.getAjcMethod() != null) {
      result = invokeAjcMethod(metaHolder.getAjcMethod(), o, metaHolder, args);
    } else {
      result = m.invoke(o, args);
    }
  } catch (IllegalAccessException e) {
    propagateCause(e);
  } catch (InvocationTargetException e) {
    propagateCause(e);
  }
  return result;
}

/**
 * Gets method name to be used to get a key for request caching.
 *
 * @return method name
 */
public String getCacheKeyMethodName() {
  return cacheKeyMethod != null ? cacheKeyMethod.getMethod().getName() : null;
}

public HystrixGeneratedCacheKey generateCacheKey(CacheInvocationContext<? extends Annotation> cacheInvocationContext) throws HystrixCacheKeyGenerationException {
  MethodExecutionAction cacheKeyMethod = cacheInvocationContext.getCacheKeyMethod();
  if (cacheKeyMethod != null) {
    try {
      return new DefaultHystrixGeneratedCacheKey((String) cacheKeyMethod.execute(cacheInvocationContext.getExecutionType()));
    } catch (Throwable throwable) {
      throw new HystrixCacheKeyGenerationException(throwable);
    }
  } else {
    if (cacheInvocationContext.hasKeyParameters()) {
      StringBuilder cacheKeyBuilder = new StringBuilder();
      for (CacheInvocationParameter parameter : cacheInvocationContext.getKeyParameters()) {
        CacheKey cacheKey = parameter.getCacheKeyAnnotation();
        if (cacheKey != null && StringUtils.isNotBlank(cacheKey.value())) {
          appendPropertyValue(cacheKeyBuilder, Arrays.asList(StringUtils.split(cacheKey.value(), ".")), parameter.getValue());
        } else {
          cacheKeyBuilder.append(parameter.getValue());
        }
      }
      return new DefaultHystrixGeneratedCacheKey(cacheKeyBuilder.toString());
    } else {
      return DefaultHystrixGeneratedCacheKey.EMPTY;
    }
  }
}

/**
 * Invokes the method. Also private method also can be invoked.
 *
 * @return result of execution
 */
@Override
public Object executeWithArgs(ExecutionType executionType, Object[] args) throws CommandActionExecutionException {
  if(ExecutionType.ASYNCHRONOUS == executionType){
    Closure closure = AsyncClosureFactory.getInstance().createClosure(metaHolder, method, object, args);
    return executeClj(closure.getClosureObj(), closure.getClosureMethod());
  }
  return execute(object, method, args);
}

private static MethodExecutionAction createCacheKeyAction(String method, MetaHolder metaHolder) {
  MethodExecutionAction cacheKeyAction = null;
  if (StringUtils.isNotBlank(method)) {
    Method cacheKeyMethod = getDeclaredMethod(metaHolder.getObj().getClass(), method,
        metaHolder.getMethod().getParameterTypes());
    if (cacheKeyMethod == null) {
      throw new HystrixCachingException("method with name '" + method + "' doesn't exist in class '"
          + metaHolder.getObj().getClass() + "'");
    }
    if (!cacheKeyMethod.getReturnType().equals(String.class)) {
      throw new HystrixCachingException("return type of cacheKey method must be String. Method: '" + method + "', Class: '"
          + metaHolder.getObj().getClass() + "'");
    }
    MetaHolder cMetaHolder = MetaHolder.builder().obj(metaHolder.getObj()).method(cacheKeyMethod).args(metaHolder.getArgs()).build();
    cacheKeyAction = new MethodExecutionAction(cMetaHolder.getObj(), cacheKeyMethod, cMetaHolder.getArgs(), cMetaHolder);
  }
  return cacheKeyAction;
}

private Object executeClj(Object o, Method m, Object... args){
  Object result = null;
  try {
    m.setAccessible(true); // suppress Java language access
    result = m.invoke(o, args);
  } catch (IllegalAccessException e) {
    propagateCause(e);
  } catch (InvocationTargetException e) {
    propagateCause(e);
  }
  return result;
}

@Override
public Object execute(ExecutionType executionType) throws CommandActionExecutionException {
  return executeWithArgs(executionType, _args);
}

fallbackAction = new MethodExecutionAction(fmMetaHolder.getObj(), fMethod, fmMetaHolder.getArgs(), fmMetaHolder);

/**
 * Invokes the method.
 *
 * @return result of execution
 */
private Object execute(Object o, Method m, Object... args) throws CommandActionExecutionException {
  Object result = null;
  try {
    m.setAccessible(true); // suppress Java language access
    if (isCompileWeaving() && metaHolder.getAjcMethod() != null) {
      result = invokeAjcMethod(metaHolder.getAjcMethod(), o, metaHolder, args);
    } else {
      result = m.invoke(o, args);
    }
  } catch (IllegalAccessException e) {
    propagateCause(e);
  } catch (InvocationTargetException e) {
    propagateCause(e);
  }
  return result;
}

private CommandAction createCommandAction(MetaHolder metaHolder) {
  return new MethodExecutionAction(metaHolder.getObj(), metaHolder.getMethod(), metaHolder.getArgs(), metaHolder);
}

private static MethodExecutionAction createCacheKeyAction(String method, MetaHolder metaHolder) {
  MethodExecutionAction cacheKeyAction = null;
  if (StringUtils.isNotBlank(method)) {
    Method cacheKeyMethod = getDeclaredMethod(metaHolder.getObj().getClass(), method,
        metaHolder.getMethod().getParameterTypes());
    if (cacheKeyMethod == null) {
      throw new HystrixCachingException("method with name '" + method + "' doesn't exist in class '"
          + metaHolder.getObj().getClass() + "'");
    }
    if (!cacheKeyMethod.getReturnType().equals(String.class)) {
      throw new HystrixCachingException("return type of cacheKey method must be String. Method: '" + method + "', Class: '"
          + metaHolder.getObj().getClass() + "'");
    }
    MetaHolder cMetaHolder = MetaHolder.builder().obj(metaHolder.getObj()).method(cacheKeyMethod).args(metaHolder.getArgs()).build();
    cacheKeyAction = new MethodExecutionAction(cMetaHolder.getObj(), cacheKeyMethod, cMetaHolder.getArgs(), cMetaHolder);
  }
  return cacheKeyAction;
}

fallbackAction = new MethodExecutionAction(fmMetaHolder.getObj(), fMethod, fmMetaHolder.getArgs(), fmMetaHolder);