package org.opendaylight.controller.cluster.raft.messages;
+import com.google.protobuf.GeneratedMessage;
+import org.opendaylight.controller.cluster.raft.ReplicatedLogEntry;
+import org.opendaylight.controller.cluster.raft.ReplicatedLogImplEntry;
+import org.opendaylight.controller.cluster.raft.protobuff.client.messages.Payload;
+import org.opendaylight.controller.cluster.raft.protobuff.messages.AppendEntriesMessages;
+
+import java.util.ArrayList;
+import java.util.Iterator;
import java.util.List;
+import java.util.Map;
/**
* Invoked by leader to replicate log entries (§5.3); also used as
* heartbeat (§5.2).
*/
-public class AppendEntries {
- // Leaders term
- private final long term;
+public class AppendEntries extends AbstractRaftRPC {
+
+ public static final Class SERIALIZABLE_CLASS = AppendEntriesMessages.AppendEntries.class;
+
+ private static final org.slf4j.Logger LOG = org.slf4j.LoggerFactory.getLogger(AppendEntries.class);
// So that follower can redirect clients
private final String leaderId;
// log entries to store (empty for heartbeat;
// may send more than one for efficiency)
- private final List<Object> entries;
+ private final List<ReplicatedLogEntry> entries;
+
+ // leader's commitIndex
+ private final long leaderCommit;
public AppendEntries(long term, String leaderId, long prevLogIndex,
- long prevLogTerm, List<Object> entries) {
- this.term = term;
+ long prevLogTerm, List<ReplicatedLogEntry> entries, long leaderCommit) {
+ super(term);
this.leaderId = leaderId;
this.prevLogIndex = prevLogIndex;
this.prevLogTerm = prevLogTerm;
this.entries = entries;
- }
-
- public long getTerm() {
- return term;
+ this.leaderCommit = leaderCommit;
}
public String getLeaderId() {
return prevLogTerm;
}
- public List<Object> getEntries() {
+ public List<ReplicatedLogEntry> getEntries() {
return entries;
}
+
+ public long getLeaderCommit() {
+ return leaderCommit;
+ }
+
+ @Override public String toString() {
+ final StringBuilder sb =
+ new StringBuilder("AppendEntries{");
+ sb.append("term=").append(getTerm());
+ sb.append("leaderId='").append(leaderId).append('\'');
+ sb.append(", prevLogIndex=").append(prevLogIndex);
+ sb.append(", prevLogTerm=").append(prevLogTerm);
+ sb.append(", entries=").append(entries);
+ sb.append(", leaderCommit=").append(leaderCommit);
+ sb.append('}');
+ return sb.toString();
+ }
+
+ public <T extends Object> Object toSerializable(){
+ AppendEntriesMessages.AppendEntries.Builder to = AppendEntriesMessages.AppendEntries.newBuilder();
+ to.setTerm(this.getTerm())
+ .setLeaderId(this.getLeaderId())
+ .setPrevLogTerm(this.getPrevLogTerm())
+ .setPrevLogIndex(this.getPrevLogIndex())
+ .setLeaderCommit(this.getLeaderCommit());
+
+ for (ReplicatedLogEntry logEntry : this.getEntries()) {
+
+ AppendEntriesMessages.AppendEntries.ReplicatedLogEntry.Builder arBuilder =
+ AppendEntriesMessages.AppendEntries.ReplicatedLogEntry.newBuilder();
+
+ AppendEntriesMessages.AppendEntries.ReplicatedLogEntry.Payload.Builder arpBuilder =
+ AppendEntriesMessages.AppendEntries.ReplicatedLogEntry.Payload.newBuilder();
+
+ //get the client specific payload extensions and add them to the payload builder
+ Map<GeneratedMessage.GeneratedExtension, T> map = logEntry.getData().encode();
+ Iterator<Map.Entry<GeneratedMessage.GeneratedExtension, T>> iter = map.entrySet().iterator();
+
+ while (iter.hasNext()) {
+ Map.Entry<GeneratedMessage.GeneratedExtension, T> entry = iter.next();
+ arpBuilder.setExtension(entry.getKey(), entry.getValue());
+ }
+
+ arpBuilder.setClientPayloadClassName(logEntry.getData().getClientPayloadClassName());
+
+ arBuilder.setData(arpBuilder).setIndex(logEntry.getIndex()).setTerm(logEntry.getTerm());
+ to.addLogEntries(arBuilder);
+ }
+
+ return to.build();
+ }
+
+ public static AppendEntries fromSerializable(Object o){
+ AppendEntriesMessages.AppendEntries from = (AppendEntriesMessages.AppendEntries) o;
+
+ List<ReplicatedLogEntry> logEntryList = new ArrayList<>();
+ for (AppendEntriesMessages.AppendEntries.ReplicatedLogEntry leProtoBuff : from.getLogEntriesList()) {
+
+ Payload payload = null ;
+ try {
+ if(leProtoBuff.getData() != null && leProtoBuff.getData().getClientPayloadClassName() != null) {
+ String clientPayloadClassName = leProtoBuff.getData().getClientPayloadClassName();
+ payload = (Payload)Class.forName(clientPayloadClassName).newInstance();
+ payload = payload.decode(leProtoBuff.getData());
+ payload.setClientPayloadClassName(clientPayloadClassName);
+ } else {
+ LOG.error("Payload is null or payload does not have client payload class name");
+ }
+
+ } catch (InstantiationException e) {
+ LOG.error("InstantiationException when instantiating "+leProtoBuff.getData().getClientPayloadClassName(), e);
+ } catch (IllegalAccessException e) {
+ LOG.error("IllegalAccessException when accessing "+leProtoBuff.getData().getClientPayloadClassName(), e);
+ } catch (ClassNotFoundException e) {
+ LOG.error("ClassNotFoundException when loading "+leProtoBuff.getData().getClientPayloadClassName(), e);
+ }
+ ReplicatedLogEntry logEntry = new ReplicatedLogImplEntry(
+ leProtoBuff.getIndex(), leProtoBuff.getTerm(), payload);
+ logEntryList.add(logEntry);
+ }
+
+ AppendEntries to = new AppendEntries(from.getTerm(),
+ from.getLeaderId(),
+ from.getPrevLogIndex(),
+ from.getPrevLogTerm(),
+ logEntryList,
+ from.getLeaderCommit());
+
+ return to;
+ }
}