Java ExecutionContext.containsKey方法代码示例

import org.springframework.batch.item.ExecutionContext; //导入方法依赖的package包/类
@Override
public void open(ExecutionContext executionContext) throws
        ItemStreamException {
    if (executionContext == null) {
        throw new IllegalArgumentException();
    }

    if (executionContext.containsKey(IDS_NUMBER)) {
        number = executionContext.getInt(IDS_NUMBER);
        count = executionContext.getInt(CURRENT_ID_COUNT);
        ids = new String[number];

        for (int i = 0; i < number; i++) {
            ids[i] = executionContext.getString(LIST_ID + i);
        }
    } else {
        ids = loadListIds();
        number = ids.length;
        count = 0;
    }
}
 

import org.springframework.batch.item.ExecutionContext; //导入方法依赖的package包/类
/**
 * Executes the task as specified by the taskName with the associated
 * properties and arguments.
 * @param contribution mutable state to be passed back to update the current step execution
 * @param chunkContext contains the task-execution-id used by the listener.
 * @return Repeat status of FINISHED.
 */
@Override
public RepeatStatus execute(StepContribution contribution,
		ChunkContext chunkContext) throws Exception {
	String tmpTaskName = this.taskName.substring(0,
			this.taskName.lastIndexOf('_'));

	List<String> args = this.arguments;

	ExecutionContext stepExecutionContext = chunkContext.getStepContext().getStepExecution().
			getExecutionContext();
	if(stepExecutionContext.containsKey("task-arguments")) {
		args = (List<String>) stepExecutionContext.get("task-arguments");
	}

	long executionId = this.taskOperations.launch(tmpTaskName,
			this.properties, args);

	stepExecutionContext.put("task-execution-id", executionId);
	stepExecutionContext.put("task-arguments", args);

	waitForTaskToComplete(executionId);

	return RepeatStatus.FINISHED;
}
 

import org.springframework.batch.item.ExecutionContext; //导入方法依赖的package包/类
/**
 * Apply the @DEFAULT_ITEM_SEPARATOR delimiter after the writing of the header. 
 * This changes from the default implementation where the @itemSeparator would have been applied per default.
 * 
 * @param executionContext
 * @throws ItemStreamException
 */
private void doOpen(ExecutionContext executionContext)
		throws ItemStreamException {
	OutputState outputState = getOutputState();
	if (executionContext
			.containsKey(getExecutionContextKey(RESTART_DATA_NAME))) {
		outputState.restoreFrom(executionContext);
	}
	try {
		outputState.initializeBufferedWriter();
	} catch (IOException ioe) {
		throw new ItemStreamException("Failed to initialize writer", ioe);
	}
	if (outputState.lastMarkedByteOffsetPosition == 0
			&& !outputState.appending) {
		if (headerFooterCallback != null) {
			try {
				headerFooterCallback
						.writeHeader(outputState.outputBufferedWriter);					
				outputState.write(DEFAULT_ITEM_SEPARATOR);
			} catch (IOException e) {
				throw new ItemStreamException(
						"Could not write headers.  The file may be corrupt.",
						e);
			}
		}
	}
}
 

import org.springframework.batch.item.ExecutionContext; //导入方法依赖的package包/类
/**
 * Open the output source.
 * @param newExecutionContext Set the execution context
 * @see org.springframework.batch.item.ItemStream#open(ExecutionContext)
 */
public final void open(final ExecutionContext newExecutionContext) {

	Assert.notNull(resource, "The resource must be set");

	long startAtPosition = 0;
	boolean restarted = false;

	// if restart data is provided, restart from provided offset
	// otherwise start from beginning
	if (newExecutionContext.containsKey(getKey(RESTART_DATA_NAME))) {
		startAtPosition = newExecutionContext
				.getLong(getKey(RESTART_DATA_NAME));
		restarted = true;
	}

	open(startAtPosition, restarted);

	if (startAtPosition == 0) {
		try {
			if (headerCallback != null) {
				headerCallback.write(delegateEventWriter);
			}
		} catch (IOException e) {
			throw new ItemStreamException("Failed to write headerItems", e);
		}
	}

}
 

import org.springframework.batch.item.ExecutionContext; //导入方法依赖的package包/类
/**
 * Open the output source
 *
 * @see org.springframework.batch.item.ItemStream#open(ExecutionContext)
 */
public void open(ExecutionContext executionContext) {

	Assert.notNull(resource, "The resource must be set");

	long startAtPosition = 0;
	boolean restarted = false;

	// if restart data is provided, restart from provided offset
	// otherwise start from beginning
	if (executionContext.containsKey(getKey(RESTART_DATA_NAME))) {
		startAtPosition = executionContext
				.getLong(getKey(RESTART_DATA_NAME));
		restarted = true;
	}

	open(startAtPosition, restarted);

	if (startAtPosition == 0) {
		try {
			if (headerCallback != null) {
				headerCallback.write(delegateEventWriter);
			}
		} catch (IOException e) {
			throw new ItemStreamException("Failed to write headerItems", e);
		}
	}

}