Java BTree.empty方法代码示例

import org.apache.cassandra.utils.btree.BTree; //导入方法依赖的package包/类
@Test
public void testSlicingAllSmallTrees() throws ExecutionException, InterruptedException
{
    Object[] cur = BTree.empty();
    TreeSet<Integer> canon = new TreeSet<>();
    // we set FAN_FACTOR to 4, so 128 items is four levels deep, three fully populated
    for (int i = 0 ; i < 128 ; i++)
    {
        String id = String.format("[0..%d)", canon.size());
        System.out.println("Testing " + id);
        Futures.allAsList(testAllSlices(id, cur, canon)).get();
        Object[] next = null;
        while (next == null)
            next = BTree.update(cur, ICMP, Arrays.asList(i), true, SPORADIC_ABORT);
        cur = next;
        canon.add(i);
    }
}
 

import org.apache.cassandra.utils.btree.BTree; //导入方法依赖的package包/类
private PartitionUpdate(CFMetaData metadata,
                        DecoratedKey key,
                        PartitionColumns columns,
                        MutableDeletionInfo deletionInfo,
                        int initialRowCapacity,
                        boolean canHaveShadowedData)
{
    super(metadata, key);
    this.deletionInfo = deletionInfo;
    this.holder = new Holder(columns, BTree.empty(), deletionInfo, Rows.EMPTY_STATIC_ROW, EncodingStats.NO_STATS);
    this.canHaveShadowedData = canHaveShadowedData;
    rowBuilder = builder(initialRowCapacity);
}
 

import org.apache.cassandra.utils.btree.BTree; //导入方法依赖的package包/类
@Test
public void testSlicingAllSmallTrees() throws ExecutionException, InterruptedException
{
    Object[] cur = BTree.empty();
    TreeSet<Integer> canon = new TreeSet<>();
    // we set FAN_FACTOR to 4, so 128 items is four levels deep, three fully populated
    for (int i = 0 ; i < 128 ; i++)
    {
        String id = String.format("[0..%d)", canon.size());
        System.out.println("Testing " + id);
        Futures.allAsList(testAllSlices(id, cur, canon)).get();
        cur = BTree.update(cur, ICMP, Arrays.asList(i), true, null, null);
        canon.add(i);
    }
}
 

import org.apache.cassandra.utils.btree.BTree; //导入方法依赖的package包/类
public static BTreeRow emptyRow(Clustering clustering)
{
    return new BTreeRow(clustering, BTree.empty(), Integer.MAX_VALUE);
}
 

import org.apache.cassandra.utils.btree.BTree; //导入方法依赖的package包/类
/**
 * Creates a empty immutable partition update.
 *
 * @param metadata the metadata for the created update.
 * @param key the partition key for the created update.
 *
 * @return the newly created empty (and immutable) update.
 */
public static PartitionUpdate emptyUpdate(CFMetaData metadata, DecoratedKey key)
{
    MutableDeletionInfo deletionInfo = MutableDeletionInfo.live();
    Holder holder = new Holder(PartitionColumns.NONE, BTree.empty(), deletionInfo, Rows.EMPTY_STATIC_ROW, EncodingStats.NO_STATS);
    return new PartitionUpdate(metadata, key, holder, deletionInfo, false);
}
 

import org.apache.cassandra.utils.btree.BTree; //导入方法依赖的package包/类
/**
 * Creates an immutable partition update that entirely deletes a given partition.
 *
 * @param metadata the metadata for the created update.
 * @param key the partition key for the partition that the created update should delete.
 * @param timestamp the timestamp for the deletion.
 * @param nowInSec the current time in seconds to use as local deletion time for the partition deletion.
 *
 * @return the newly created partition deletion update.
 */
public static PartitionUpdate fullPartitionDelete(CFMetaData metadata, DecoratedKey key, long timestamp, int nowInSec)
{
    MutableDeletionInfo deletionInfo = new MutableDeletionInfo(timestamp, nowInSec);
    Holder holder = new Holder(PartitionColumns.NONE, BTree.empty(), deletionInfo, Rows.EMPTY_STATIC_ROW, EncodingStats.NO_STATS);
    return new PartitionUpdate(metadata, key, holder, deletionInfo, false);
}