How to use

setAttribute

method

in

org.springframework.batch.core.scope.context.JobContext

private void setContextFromCollaborator() {
  if (context != null) {
    context.setAttribute("collaborator", collaborator.getName());
    context.setAttribute("collaborator.class", collaborator.getClass().toString());
    if (collaborator.getParent()!=null) {
      context.setAttribute("parent", collaborator.getParent().getName());
      context.setAttribute("parent.class", collaborator.getParent().getClass().toString());
    }
  }
}

/**
 * @see Scope#get(String, ObjectFactory)
 */
@Override
public Object get(String name, ObjectFactory<?> objectFactory) {
  JobContext context = getContext();
  Object scopedObject = context.getAttribute(name);
  if (scopedObject == null) {
    synchronized (mutex) {
      scopedObject = context.getAttribute(name);
      if (scopedObject == null) {
        if (logger.isDebugEnabled()) {
          logger.debug(String.format("Creating object in scope=%s, name=%s", this.getName(), name));
        }
        scopedObject = objectFactory.getObject();
        context.setAttribute(name, scopedObject);
      }
    }
  }
  return scopedObject;
}

  @Override
  public JobContext call() throws Exception {
    try {
      JobSynchronizationManager.register(jobExecution);
      JobContext context = JobSynchronizationManager.getContext();
      context.setAttribute("foo", "bar");
      return context;
    }
    finally {
      JobSynchronizationManager.close();
    }
  }
});

@Test
public void testRegisterDestructionCallback() {
  final List<String> list = new ArrayList<>();
  context.setAttribute("foo", "bar");
  scope.registerDestructionCallback("foo", new Runnable() {
    @Override
    public void run() {
      list.add("foo");
    }
  });
  assertEquals(0, list.size());
  // When the context is closed, provided the attribute exists the
  // callback is called...
  context.close();
  assertEquals(1, list.size());
}

@Test
public void testDestructionCallbackSunnyDay() throws Exception {
  context.setAttribute("foo", "FOO");
  context.registerDestructionCallback("foo", new Runnable() {
    @Override
    public void run() {
      list.add("bar");
    }
  });
  context.close();
  assertEquals(1, list.size());
  assertEquals("bar", list.get(0));
}

@Test
public void testRemove() {
  context.setAttribute("foo", "bar");
  scope.remove("foo");
  assertFalse(context.hasAttribute("foo"));
}

@Test
public void testRegisterAnotherDestructionCallback() {
  final List<String> list = new ArrayList<>();
  context.setAttribute("foo", "bar");
  scope.registerDestructionCallback("foo", new Runnable() {
    @Override
    public void run() {
      list.add("foo");
    }
  });
  scope.registerDestructionCallback("foo", new Runnable() {
    @Override
    public void run() {
      list.add("bar");
    }
  });
  assertEquals(0, list.size());
  // When the context is closed, provided the attribute exists the
  // callback is called...
  context.close();
  assertEquals(2, list.size());
}

@Test
public void testDestructionCallbackWithException() throws Exception {
  context.setAttribute("foo", "FOO");
  context.setAttribute("bar", "BAR");
  context.registerDestructionCallback("bar", new Runnable() {
    @Override

@Test
public void testGetWithSomethingAlreadyThere() {
  context.setAttribute("foo", "bar");
  Object value = scope.get("foo", new ObjectFactory<String>() {
    @Override
    public String getObject() throws BeansException {
      return null;
    }
  });
  assertEquals("bar", value);
  assertTrue(context.hasAttribute("foo"));
}

/**
 * @see Scope#get(String, ObjectFactory)
 */
@Override
public Object get(String name, ObjectFactory<?> objectFactory) {
  JobContext context = getContext();
  Object scopedObject = context.getAttribute(name);
  if (scopedObject == null) {
    synchronized (mutex) {
      scopedObject = context.getAttribute(name);
      if (scopedObject == null) {
        if (logger.isDebugEnabled()) {
          logger.debug(String.format("Creating object in scope=%s, name=%s", this.getName(), name));
        }
        scopedObject = objectFactory.getObject();
        context.setAttribute(name, scopedObject);
      }
    }
  }
  return scopedObject;
}

/**
 * @see Scope#get(String, ObjectFactory)
 */
@Override
public Object get(String name, ObjectFactory<?> objectFactory) {
  JobContext context = getContext();
  Object scopedObject = context.getAttribute(name);
  if (scopedObject == null) {
    synchronized (mutex) {
      scopedObject = context.getAttribute(name);
      if (scopedObject == null) {
        if (logger.isDebugEnabled()) {
          logger.debug(String.format("Creating object in scope=%s, name=%s", this.getName(), name));
        }
        scopedObject = objectFactory.getObject();
        context.setAttribute(name, scopedObject);
      }
    }
  }
  return scopedObject;
}

/**
 * @see Scope#get(String, ObjectFactory)
 */
@Override
public Object get(String name, ObjectFactory<?> objectFactory) {
  JobContext context = getContext();
  Object scopedObject = context.getAttribute(name);
  if (scopedObject == null) {
    synchronized (mutex) {
      scopedObject = context.getAttribute(name);
      if (scopedObject == null) {
        logger.debug(String.format("Creating object in scope=%s, name=%s", this.getName(), name));
        scopedObject = objectFactory.getObject();
        context.setAttribute(name, scopedObject);
      }
    }
  }
  return scopedObject;
}