* terms of the Eclipse Public License v1.0 which accompanies this distribution,
* and is available at http://www.eclipse.org/legal/epl-v10.html
*/
-
package org.opendaylight.controller.cluster.raft.behaviors;
-import com.google.common.base.Optional;
-import com.google.common.base.Preconditions;
-import com.google.protobuf.ByteString;
+import static java.util.Objects.requireNonNull;
+
+import com.google.common.io.ByteSource;
+import java.io.BufferedOutputStream;
+import java.io.IOException;
import java.util.Arrays;
+import java.util.OptionalInt;
+import org.opendaylight.controller.cluster.io.FileBackedOutputStream;
+import org.opendaylight.controller.cluster.raft.RaftActorContext;
import org.slf4j.Logger;
/**
- * SnapshotTracker does house keeping for a snapshot that is being installed in chunks on the Follower
+ * Helper class that maintains state for a snapshot that is being installed in chunks on a Follower.
*/
-public class SnapshotTracker {
- private final Logger LOG;
+class SnapshotTracker implements AutoCloseable {
+ private final Logger log;
private final int totalChunks;
private final String leaderId;
- private ByteString collectedChunks = ByteString.EMPTY;
- private int lastChunkIndex = AbstractLeader.FIRST_CHUNK_INDEX - 1;
+ private final BufferedOutputStream bufferedStream;
+ private final FileBackedOutputStream fileBackedStream;
+ private int lastChunkIndex = LeaderInstallSnapshotState.FIRST_CHUNK_INDEX - 1;
private boolean sealed = false;
- private int lastChunkHashCode = AbstractLeader.INITIAL_LAST_CHUNK_HASH_CODE;
+ private int lastChunkHashCode = LeaderInstallSnapshotState.INITIAL_LAST_CHUNK_HASH_CODE;
+ private long count;
- SnapshotTracker(Logger LOG, int totalChunks, String leaderId) {
- this.LOG = LOG;
+ SnapshotTracker(final Logger log, final int totalChunks, final String leaderId, final RaftActorContext context) {
+ this.log = log;
this.totalChunks = totalChunks;
- this.leaderId = Preconditions.checkNotNull(leaderId);
+ this.leaderId = requireNonNull(leaderId);
+ fileBackedStream = context.getFileBackedOutputStreamFactory().newInstance();
+ bufferedStream = new BufferedOutputStream(fileBackedStream);
}
/**
- * Adds a chunk to the tracker
+ * Adds a chunk to the tracker.
*
- * @param chunkIndex
- * @param chunk
- * @return true when the lastChunk is received
- * @throws InvalidChunkException
+ * @param chunkIndex the index of the chunk
+ * @param chunk the chunk data
+ * @param lastChunkHashCode the optional hash code for the chunk
+ * @return true if this is the last chunk is received
+ * @throws InvalidChunkException if the chunk index is invalid or out of order
*/
- boolean addChunk(int chunkIndex, byte[] chunk, Optional<Integer> lastChunkHashCode) throws InvalidChunkException{
- LOG.debug("addChunk: chunkIndex={}, lastChunkIndex={}, collectedChunks.size={}, lastChunkHashCode={}",
- chunkIndex, lastChunkIndex, collectedChunks.size(), this.lastChunkHashCode);
-
- if(sealed){
- throw new InvalidChunkException("Invalid chunk received with chunkIndex " + chunkIndex + " all chunks already received");
+ boolean addChunk(final int chunkIndex, final byte[] chunk, final OptionalInt maybeLastChunkHashCode)
+ throws InvalidChunkException, IOException {
+ log.debug("addChunk: chunkIndex={}, lastChunkIndex={}, collectedChunks.size={}, lastChunkHashCode={}",
+ chunkIndex, lastChunkIndex, count, this.lastChunkHashCode);
+
+ if (sealed) {
+ throw new InvalidChunkException("Invalid chunk received with chunkIndex " + chunkIndex
+ + " all chunks already received");
}
- if(lastChunkIndex + 1 != chunkIndex){
+ if (lastChunkIndex + 1 != chunkIndex) {
throw new InvalidChunkException("Expected chunkIndex " + (lastChunkIndex + 1) + " got " + chunkIndex);
}
- if(lastChunkHashCode.isPresent()){
- if(lastChunkHashCode.get() != this.lastChunkHashCode){
- throw new InvalidChunkException("The hash code of the recorded last chunk does not match " +
- "the senders hash code, expected " + this.lastChunkHashCode + " was " + lastChunkHashCode.get());
- }
+ if (maybeLastChunkHashCode.isPresent() && maybeLastChunkHashCode.getAsInt() != this.lastChunkHashCode) {
+ throw new InvalidChunkException("The hash code of the recorded last chunk does not match "
+ + "the senders hash code, expected " + this.lastChunkHashCode + " was "
+ + maybeLastChunkHashCode.getAsInt());
}
+ bufferedStream.write(chunk);
+
+ count += chunk.length;
sealed = chunkIndex == totalChunks;
lastChunkIndex = chunkIndex;
- collectedChunks = collectedChunks.concat(ByteString.copyFrom(chunk));
this.lastChunkHashCode = Arrays.hashCode(chunk);
return sealed;
}
- byte[] getSnapshot(){
- if(!sealed) {
+ ByteSource getSnapshotBytes() throws IOException {
+ if (!sealed) {
throw new IllegalStateException("lastChunk not received yet");
}
- return collectedChunks.toByteArray();
- }
-
- ByteString getCollectedChunks(){
- return collectedChunks;
+ bufferedStream.close();
+ return fileBackedStream.asByteSource();
}
String getLeaderId() {
return leaderId;
}
- public static class InvalidChunkException extends Exception {
+ @Override
+ public void close() {
+ fileBackedStream.cleanup();
+ }
+
+ public static class InvalidChunkException extends IOException {
private static final long serialVersionUID = 1L;
- InvalidChunkException(String message){
+ InvalidChunkException(final String message) {
super(message);
}
}
-
}
Code Review / controller.git / blobdiff