本文整理汇总了Java中org.apache.hadoop.hbase.client.Get.getMaxVersions方法的典型用法代码示例。如果您正苦于以下问题:Java Get.getMaxVersions方法的具体用法?Java Get.getMaxVersions怎么用?Java Get.getMaxVersions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org.apache.hadoop.hbase.client.Get
的用法示例。
在下文中一共展示了Get.getMaxVersions方法的2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: get
import org.apache.hadoop.hbase.client.Get; //导入方法依赖的package包/类
@Override
public Result[] get(List<Get> gets) throws IOException {
byte[][] rows = new byte[gets.size()][];
int maxVersions = 1;
int count = 0;
for(Get g:gets) {
if ( count == 0 ) {
maxVersions = g.getMaxVersions();
} else if (g.getMaxVersions() != maxVersions) {
LOG.warn("MaxVersions on Gets do not match, using the first in the list ("+maxVersions+")");
}
if (g.getFilter() != null) {
LOG.warn("filters not supported on gets");
}
rows[count] = g.getRow();
count ++;
}
String spec = buildMultiRowSpec(rows, maxVersions);
return getResults(spec);
}
示例2: prePrepareTimeStampForDeleteVersion
import org.apache.hadoop.hbase.client.Get; //导入方法依赖的package包/类
@Override
public void prePrepareTimeStampForDeleteVersion(
ObserverContext<RegionCoprocessorEnvironment> ctx, Mutation delete, Cell cell,
byte[] byteNow, Get get) throws IOException {
// Nothing to do if we are not filtering by visibility
if (!authorizationEnabled) {
return;
}
CellVisibility cellVisibility = null;
try {
cellVisibility = delete.getCellVisibility();
} catch (DeserializationException de) {
throw new IOException("Invalid cell visibility specified " + delete, de);
}
// The check for checkForReservedVisibilityTagPresence happens in preBatchMutate happens.
// It happens for every mutation and that would be enough.
List<Tag> visibilityTags = new ArrayList<Tag>();
if (cellVisibility != null) {
String labelsExp = cellVisibility.getExpression();
try {
visibilityTags = this.visibilityLabelService.createVisibilityExpTags(labelsExp, false,
false);
} catch (InvalidLabelException e) {
throw new IOException("Invalid cell visibility specified " + labelsExp, e);
}
}
get.setFilter(new DeleteVersionVisibilityExpressionFilter(visibilityTags,
VisibilityConstants.SORTED_ORDINAL_SERIALIZATION_FORMAT));
List<Cell> result = ctx.getEnvironment().getRegion().get(get, false);
if (result.size() < get.getMaxVersions()) {
// Nothing to delete
CellUtil.updateLatestStamp(cell, Long.MIN_VALUE);
return;
}
if (result.size() > get.getMaxVersions()) {
throw new RuntimeException("Unexpected size: " + result.size()
+ ". Results more than the max versions obtained.");
}
Cell getCell = result.get(get.getMaxVersions() - 1);
CellUtil.setTimestamp(cell, getCell.getTimestamp());
// We are bypassing here because in the HRegion.updateDeleteLatestVersionTimeStamp we would
// update with the current timestamp after again doing a get. As the hook as already determined
// the needed timestamp we need to bypass here.
// TODO : See if HRegion.updateDeleteLatestVersionTimeStamp() could be
// called only if the hook is not called.
ctx.bypass();
}