本文整理汇总了Java中scala.collection.Seq.head方法的典型用法代码示例。如果您正苦于以下问题：Java Seq.head方法的具体用法？Java Seq.head怎么用？Java Seq.head使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类scala.collection.Seq的用法示例。
在下文中一共展示了Seq.head方法的3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: getLeaderToShutDown
import scala.collection.Seq; //导入方法依赖的package包/类
@Override
public int getLeaderToShutDown(String topic) throws Exception {
ZkUtils zkUtils = getZkUtils();
try {
PartitionMetadata firstPart = null;
do {
if (firstPart != null) {
LOG.info("Unable to find leader. error code {}", firstPart.errorCode());
// not the first try. Sleep a bit
Thread.sleep(150);
}
Seq<PartitionMetadata> partitionMetadata = AdminUtils.fetchTopicMetadataFromZk(topic, zkUtils).partitionsMetadata();
firstPart = partitionMetadata.head();
}
while (firstPart.errorCode() != 0);
return firstPart.leader().get().id();
} finally {
zkUtils.close();
}
}
示例2: getLeaderToShutDown
import scala.collection.Seq; //导入方法依赖的package包/类
@Override
public int getLeaderToShutDown(String topic) throws Exception {
ZkClient zkClient = createZkClient();
PartitionMetadata firstPart = null;
do {
if (firstPart != null) {
LOG.info("Unable to find leader. error code {}", firstPart.errorCode());
// not the first try. Sleep a bit
Thread.sleep(150);
}
Seq<PartitionMetadata> partitionMetadata = AdminUtils.fetchTopicMetadataFromZk(topic, zkClient).partitionsMetadata();
firstPart = partitionMetadata.head();
}
while (firstPart.errorCode() != 0);
zkClient.close();
return firstPart.leader().get().id();
}
示例3: serve
import scala.collection.Seq; //导入方法依赖的package包/类
@Override
public PredictedResult serve(Query query, Seq<PredictedResult> predictions) {
return predictions.head();
}