我想要页面zrange,得到错误:请在调用此方法之前关闭管道或多块。如何解决此问题(我的群集不支持多命令https://github.com/CodisLabs/codis/blob/master/doc/unsupported_cmds.md)?
runWithPipeline(new JedisPipelinedCallback() {
@Override
public void execute(Pipeline pipeline) {
int offset = 0;
boolean finished = false;
do {
// need to paginate the keys
Set<byte[]> rawKeys = pipeline.zrange(rawKnownKeysKey, (offset) * PAGE_SIZE, (offset + 1) * PAGE_SIZE - 1).get();
finished = rawKeys.size() < PAGE_SIZE;
offset++;
if (!rawKeys.isEmpty()) {
List<byte[]> regionedKeys = new ArrayList<byte[]>();
for (byte[] rawKey : rawKeys) {
regionedKeys.add(getRegionedKey(rawRegion, rawKey));
}
pipeline.del(regionedKeys.toArray(new byte[regionedKeys.size()][]));
}
pipeline.sync();
} while (!finished);
pipeline.del(rawKnownKeysKey);
}
});
//创建{@link redis.clients.jedis.JedisPool}实例。
public static JedisPool createJedisPool(Properties props) {
String host = props.getProperty(RedisConfig.HOST, "localhost");
Integer port = Integer.decode(props.getProperty(RedisConfig.PORT, String.valueOf(Protocol.DEFAULT_PORT)));
Integer timeout = Integer.decode(props.getProperty(RedisConfig.TIMEOUT, String.valueOf(Protocol.DEFAULT_TIMEOUT))); // msec
String password = props.getProperty(RedisConfig.PASSWORD, null);
Integer database = Integer.decode(props.getProperty(RedisConfig.DATABASE, String.valueOf(Protocol.DEFAULT_DATABASE)));
log.info("create JedisPool. host=[{}], port=[{}], timeout=[{}], password=[{}], database=[{}]",
host, port, timeout, password, database);
return new JedisPool(createJedisPoolConfig(), host, port, timeout, password, database);
}
//创建{@link redis.clients.jedis.JedisPoolConfig}实例。
private static JedisPoolConfig createJedisPoolConfig() {
JedisPoolConfig poolConfig = new JedisPoolConfig();
poolConfig.setMaxTotal(256);
poolConfig.setMinIdle(2);
return poolConfig;
}
Jedis jedis = jedisPool.getResource();
private void runWithPipeline(final JedisPipelinedCallback callback) {
final Jedis jedis = jedisPool.getResource();
try {
final Pipeline pipeline = jedis.pipelined();
callback.execute(pipeline);
// use #sync(), not #exec()
pipeline.sync();
} finally {
jedisPool.returnResource(jedis);
}
}
答案 0 :(得分:3)
问题在于这部分代码,您尝试使用.get()方法从管道中检索值。
Set<byte[]> rawKeys = pipeline.zrange(rawKnownKeysKey, (offset) * PAGE_SIZE, (offset + 1) * PAGE_SIZE - 1).get();
当您在管道中发出命令时,您需要在检索值之前发出sync()命令以执行已添加到管道的所有命令,如果您尝试在发出sync()之前获取值,它将如上所述抛出错误。
解决方案:
Response<Set<byte[]>> temp = pipeline.zrange(rawKnownKeysKey, (offset) * PAGE_SIZE, (offset + 1) * PAGE_SIZE - 1);
pipeline.sync();
Set<byte[]> rawKeys = temp.get();