Github user aweisberg commented on a diff in the pull request:
https://github.com/apache/cassandra/pull/239#discussion_r200708521
--- Diff:
src/java/org/apache/cassandra/db/streaming/CassandraBlockStreamReader.java ---
@@ -0,0 +1,172 @@
+/*
+ * 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.db.streaming;
+
+import java.io.File;
+import java.io.IOException;
+import java.util.List;
+import java.util.Set;
+
+import com.google.common.base.Throwables;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import org.apache.cassandra.db.ColumnFamilyStore;
+import org.apache.cassandra.db.Directories;
+import org.apache.cassandra.db.SerializationHeader;
+import org.apache.cassandra.db.lifecycle.LifecycleTransaction;
+import org.apache.cassandra.io.sstable.Component;
+import org.apache.cassandra.io.sstable.Descriptor;
+import org.apache.cassandra.io.sstable.SSTableMultiWriter;
+import org.apache.cassandra.io.sstable.format.SSTableFormat;
+import org.apache.cassandra.io.sstable.format.Version;
+import org.apache.cassandra.io.sstable.format.big.BigTableBlockWriter;
+import org.apache.cassandra.io.util.DataInputPlus;
+import org.apache.cassandra.schema.TableId;
+import org.apache.cassandra.streaming.ProgressInfo;
+import org.apache.cassandra.streaming.StreamReceiver;
+import org.apache.cassandra.streaming.StreamSession;
+import org.apache.cassandra.streaming.messages.StreamMessageHeader;
+import org.apache.cassandra.utils.Collectors3;
+import org.apache.cassandra.utils.FBUtilities;
+
+/**
+ * CassandraBlockStreamReader reads SSTable off the wire and writes it to
disk.
+ */
+public class CassandraBlockStreamReader implements IStreamReader
+{
+ private static final Logger logger =
LoggerFactory.getLogger(CassandraBlockStreamReader.class);
+ protected final TableId tableId;
+ protected final StreamSession session;
+ protected final int sstableLevel;
+ protected final SerializationHeader.Component header;
+ protected final int fileSeqNum;
+ private final List<ComponentInfo> components;
+ private final SSTableFormat.Type format;
+ private final Version version;
+
+ public CassandraBlockStreamReader(StreamMessageHeader header,
CassandraStreamHeader streamHeader, StreamSession session)
+ {
+ if (session.getPendingRepair() != null)
+ {
+ // we should only ever be streaming pending repair
+ // sstables if the session has a pending repair id
+ if (!session.getPendingRepair().equals(header.pendingRepair))
+ throw new IllegalStateException(String.format("Stream
Session & SSTable ({}) pendingRepair UUID mismatch.",
+
header.tableId));
+ }
+ this.session = session;
+ this.tableId = header.tableId;
+ this.components = streamHeader.components;
+ this.sstableLevel = streamHeader.sstableLevel;
+ this.header = streamHeader.header;
+ this.format = streamHeader.format;
+ this.fileSeqNum = header.sequenceNumber;
+ this.version = streamHeader.version;
+ }
+
+ /**
+ * @param inputPlus where this reads data from
+ * @return SSTable transferred
+ * @throws IOException if reading the remote sstable fails. Will throw
an RTE if local write fails.
+ */
+
+ @SuppressWarnings("resource") // input needs to remain open, streams
on top of it can't be closed
+ @Override
+ public SSTableMultiWriter read(DataInputPlus inputPlus) throws
IOException
+ {
+ long totalSize = totalSize();
+
+ ColumnFamilyStore cfs = ColumnFamilyStore.getIfExists(tableId);
+ if (cfs == null)
+ {
+ // schema was dropped during streaming
+ throw new IOException("CF " + tableId + " was dropped during
streaming");
+ }
+
+ logger.debug("[Stream #{}] Start receiving file #{} from {}, size
= {}, ks = '{}', table = '{}'.",
+ session.planId(), fileSeqNum, session.peer,
totalSize, cfs.keyspace.getName(), cfs.getTableName());
+
+ BigTableBlockWriter writer = null;
+
+ try
+ {
+ Set<Component> componentsToWrite = components.stream()
+ .map(p ->
Component.parse(p.type.repr))
+
.collect(Collectors3.toImmutableSet());
+
+ writer = createWriter(cfs, totalSize, componentsToWrite);
+ long bytesRead = 0;
+ for (ComponentInfo info : components)
+ {
+ logger.debug("[Stream #{}] About to receive file {} from
{} readBytes = {}, componentSize = {}, totalSize = {}",
+ session.planId(), info.type, session.peer,
FBUtilities.prettyPrintMemory(bytesRead),
+ FBUtilities.prettyPrintMemory(info.length),
FBUtilities.prettyPrintMemory(totalSize));
+ writer.writeComponent(info.type, inputPlus, info.length);
+
session.progress(writer.descriptor.filenameFor(Component.parse(info.type.repr)),
ProgressInfo.Direction.IN, info.length, info.length);
+ bytesRead += info.length;
+ logger.debug("[Stream #{}] Finished receiving file {} from
{} readBytes = {}, componentSize = {}, totalSize = {}",
+ session.planId(), info.type, session.peer,
FBUtilities.prettyPrintMemory(bytesRead),
+ FBUtilities.prettyPrintMemory(info.length),
FBUtilities.prettyPrintMemory(totalSize));
+ }
+
+ return writer;
+ }
+ catch (Throwable e)
+ {
+ logger.error("[Stream {}] Error while reading from stream on
ks='{}' and table='{}'.",
+ session.planId(), cfs.keyspace.getName(),
cfs.getTableName(), e);
+ if (writer != null)
+ {
+ writer.abort(e);
+ }
+ throw Throwables.propagate(e);
+ }
+ }
+
+ @SuppressWarnings("resource")
+ protected BigTableBlockWriter createWriter(ColumnFamilyStore cfs, long
totalSize, Set<Component> componentsToWrite) throws IOException
+ {
+ Directories.DataDirectory localDir =
cfs.getDirectories().getWriteableLocation(totalSize);
+ if (localDir == null)
+ throw new IOException(String.format("Insufficient disk space
to store %s", FBUtilities.prettyPrintMemory(totalSize)));
--- End diff --
missing braces
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