本文整理汇总了Java中org.apache.rocketmq.common.protocol.header.ViewMessageRequestHeader类的典型用法代码示例。如果您正苦于以下问题：Java ViewMessageRequestHeader类的具体用法？Java ViewMessageRequestHeader怎么用？Java ViewMessageRequestHeader使用的例子？那么, 这里精选的类代码示例或许可以为您提供帮助。
ViewMessageRequestHeader类属于org.apache.rocketmq.common.protocol.header包，在下文中一共展示了ViewMessageRequestHeader类的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的Java代码示例。
示例1: viewMessageById
import org.apache.rocketmq.common.protocol.header.ViewMessageRequestHeader; //导入依赖的package包/类
public RemotingCommand viewMessageById(ChannelHandlerContext ctx, RemotingCommand request)
throws RemotingCommandException {
final RemotingCommand response = RemotingCommand.createResponseCommand(null);
final ViewMessageRequestHeader requestHeader =
(ViewMessageRequestHeader) request.decodeCommandCustomHeader(ViewMessageRequestHeader.class);
response.setOpaque(request.getOpaque());
final SelectMappedBufferResult selectMappedBufferResult =
this.brokerController.getMessageStore().selectOneMessageByOffset(requestHeader.getOffset());
if (selectMappedBufferResult != null) {
response.setCode(ResponseCode.SUCCESS);
response.setRemark(null);
try {
FileRegion fileRegion =
new OneMessageTransfer(response.encodeHeader(selectMappedBufferResult.getSize()),
selectMappedBufferResult);
ctx.channel().writeAndFlush(fileRegion).addListener(new ChannelFutureListener() {
@Override
public void operationComplete(ChannelFuture future) throws Exception {
selectMappedBufferResult.release();
if (!future.isSuccess()) {
log.error("Transfer one message from page cache failed, ", future.cause());
}
}
});
} catch (Throwable e) {
log.error("", e);
selectMappedBufferResult.release();
}
return null;
} else {
response.setCode(ResponseCode.SYSTEM_ERROR);
response.setRemark("can not find message by the offset, " + requestHeader.getOffset());
}
return response;
}