Java tutorial
/** * Licensed to the Apache Software Foundation (ASF) under one * or more contributor license agreements. See the NOTICE file * distributed with this work for additional information * regarding copyright ownership. The ASF licenses this file * to you under the Apache License, Version 2.0 (the * "License"); you may not use this file except in compliance * with the License. You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, * software distributed under the License is distributed on an * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY * KIND, either express or implied. See the License for the * specific language governing permissions and limitations * under the License. */ package org.apache.cassandra.io.sstable; import java.util.Collection; import java.util.Set; import com.google.common.base.Throwables; import org.apache.cassandra.db.partitions.UnfilteredPartitionIterator; import org.apache.cassandra.io.sstable.format.SSTableReader; import org.apache.cassandra.utils.JVMStabilityInspector; /** * An ISSTableScanner is an abstraction allowing multiple SSTableScanners to be * chained together under the hood. See LeveledCompactionStrategy.getScanners. */ public interface ISSTableScanner extends UnfilteredPartitionIterator { public long getLengthInBytes(); public long getCompressedLengthInBytes(); public long getCurrentPosition(); public long getBytesScanned(); public Set<SSTableReader> getBackingSSTables(); public static void closeAllAndPropagate(Collection<ISSTableScanner> scanners, Throwable throwable) { for (ISSTableScanner scanner : scanners) { try { scanner.close(); } catch (Throwable t2) { JVMStabilityInspector.inspectThrowable(t2); if (throwable == null) { throwable = t2; } else { throwable.addSuppressed(t2); } } } if (throwable != null) { Throwables.propagate(throwable); } } }