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-rw-r--r--src/main/java/pl/edu/mimuw/cloudatlas/agent/messages/HejkaMessage.java14
-rw-r--r--src/main/java/pl/edu/mimuw/cloudatlas/agent/messages/NoCoTamMessage.java2
-rw-r--r--src/main/java/pl/edu/mimuw/cloudatlas/agent/modules/GossipGirl.java106
-rw-r--r--src/main/java/pl/edu/mimuw/cloudatlas/agent/modules/GossipGirlState.java168
4 files changed, 259 insertions, 31 deletions
diff --git a/src/main/java/pl/edu/mimuw/cloudatlas/agent/messages/HejkaMessage.java b/src/main/java/pl/edu/mimuw/cloudatlas/agent/messages/HejkaMessage.java
index 340d939..62554a5 100644
--- a/src/main/java/pl/edu/mimuw/cloudatlas/agent/messages/HejkaMessage.java
+++ b/src/main/java/pl/edu/mimuw/cloudatlas/agent/messages/HejkaMessage.java
@@ -8,12 +8,16 @@ import pl.edu.mimuw.cloudatlas.model.ValueTime;
public class HejkaMessage extends RemoteGossipGirlMessage {
private long senderGossipId;
+ private PathName senderPath;
+ private PathName receiverPath;
private Map<PathName, ValueTime> zoneTimestamps;
private Map<Attribute, ValueTime> queryTimestamps;
- public HejkaMessage(String messageId, long timestamp, long senderGossipId, Map<PathName, ValueTime> zoneTimestamps, Map<Attribute, ValueTime> queryTimestamps) {
+ public HejkaMessage(String messageId, long timestamp, long senderGossipId, PathName senderPath, PathName receiverPath, Map<PathName, ValueTime> zoneTimestamps, Map<Attribute, ValueTime> queryTimestamps) {
super(messageId, timestamp, Type.HEJKA);
this.senderGossipId = senderGossipId;
+ this.senderPath = senderPath;
+ this.receiverPath = receiverPath;
this.zoneTimestamps = zoneTimestamps;
this.queryTimestamps = queryTimestamps;
}
@@ -22,6 +26,14 @@ public class HejkaMessage extends RemoteGossipGirlMessage {
return senderGossipId;
}
+ public PathName getSenderPath() {
+ return senderPath;
+ }
+
+ public PathName getReceiverPath() {
+ return receiverPath;
+ }
+
public Map<PathName, ValueTime> getZoneTimestamps() {
return zoneTimestamps;
}
diff --git a/src/main/java/pl/edu/mimuw/cloudatlas/agent/messages/NoCoTamMessage.java b/src/main/java/pl/edu/mimuw/cloudatlas/agent/messages/NoCoTamMessage.java
index 3dd0c4d..c23722c 100644
--- a/src/main/java/pl/edu/mimuw/cloudatlas/agent/messages/NoCoTamMessage.java
+++ b/src/main/java/pl/edu/mimuw/cloudatlas/agent/messages/NoCoTamMessage.java
@@ -14,7 +14,7 @@ public class NoCoTamMessage extends RemoteGossipGirlMessage {
private ValueTime hejkaSendTimestamp;
private ValueTime hejkaReceiveTimestamp;
- public NoCoTamMessage(String messageId, long timestamp, long receiverGossipId, long senderGossipId, Map<PathName, ValueTime> zoneTimestamps, Map<Attribute, ValueTime> queryTimestamps, ValueTime hejkaSendTimestamp, ValueTime hejkaReceiveTimestamp) {
+ public NoCoTamMessage(String messageId, long timestamp, long senderGossipId, long receiverGossipId, Map<PathName, ValueTime> zoneTimestamps, Map<Attribute, ValueTime> queryTimestamps, ValueTime hejkaSendTimestamp, ValueTime hejkaReceiveTimestamp) {
super(messageId, timestamp, Type.NO_CO_TAM);
this.receiverGossipId = receiverGossipId;
this.senderGossipId = senderGossipId;
diff --git a/src/main/java/pl/edu/mimuw/cloudatlas/agent/modules/GossipGirl.java b/src/main/java/pl/edu/mimuw/cloudatlas/agent/modules/GossipGirl.java
index 73aef8b..dd8f0b7 100644
--- a/src/main/java/pl/edu/mimuw/cloudatlas/agent/modules/GossipGirl.java
+++ b/src/main/java/pl/edu/mimuw/cloudatlas/agent/modules/GossipGirl.java
@@ -1,5 +1,6 @@
package pl.edu.mimuw.cloudatlas.agent.modules;
+import java.util.AbstractMap.SimpleImmutableEntry;
import java.util.HashMap;
import java.util.Map;
import java.util.Map.Entry;
@@ -14,9 +15,12 @@ import pl.edu.mimuw.cloudatlas.agent.messages.QueryMessage;
import pl.edu.mimuw.cloudatlas.agent.messages.ResponseMessage;
import pl.edu.mimuw.cloudatlas.agent.messages.StateMessage;
import pl.edu.mimuw.cloudatlas.agent.messages.UDUPMessage;
+import pl.edu.mimuw.cloudatlas.agent.messages.UpdateAttributesMessage;
+import pl.edu.mimuw.cloudatlas.agent.messages.UpdateQueriesMessage;
import pl.edu.mimuw.cloudatlas.model.Attribute;
import pl.edu.mimuw.cloudatlas.model.AttributesMap;
import pl.edu.mimuw.cloudatlas.model.PathName;
+import pl.edu.mimuw.cloudatlas.model.ValueContact;
import pl.edu.mimuw.cloudatlas.model.ValueQuery;
import pl.edu.mimuw.cloudatlas.model.ValueTime;
import pl.edu.mimuw.cloudatlas.model.ZMI;
@@ -35,9 +39,18 @@ public class GossipGirl extends Module {
case INITIATE:
initiateGossip((InitiateGossipMessage) message);
break;
+ case HEJKA:
+ receiveGossip((HejkaMessage) message);
+ break;
case NO_CO_TAM:
handleNoCoTam((NoCoTamMessage) message);
break;
+ case ATTRIBUTES:
+ handleAttributes((AttributesMessage) message);
+ break;
+ case QUERY:
+ handleQuery((QueryMessage) message);
+ break;
default:
throw new InvalidMessageType("This type of message cannot be handled by GossipGirl");
}
@@ -62,6 +75,23 @@ public class GossipGirl extends Module {
sendMessage(getState);
}
+ private void receiveGossip(HejkaMessage message) throws InterruptedException {
+ Long gossipId = nextGossipId;
+ nextGossipId++;
+ gossipStates.put(gossipId, new GossipGirlState(
+ gossipId,
+ message.getReceiverPath(),
+ new ValueContact(message.getSenderPath(), message.getSenderAddress()),
+ false
+ )
+ );
+
+ gossipStates.get(gossipId).handleHejka(message);
+
+ GetStateMessage getState = new GetStateMessage("", 0, ModuleType.GOSSIP, gossipId);
+ sendMessage(getState);
+ }
+
private void setState(StateMessage message) throws InterruptedException {
GossipGirlState state = gossipStates.get(message.getRequestId());
if (state != null) {
@@ -71,12 +101,28 @@ public class GossipGirl extends Module {
"",
0,
state.gossipId,
+ state.ourPath,
+ state.theirContact.getName(),
state.getZoneTimestampsToSend(),
state.getQueryTimestampsToSend()
);
UDUPMessage udupMessage = new UDUPMessage("", 0, state.theirContact, hejka);
sendMessage(udupMessage);
state.sentHejka();
+ } else if (state.state == GossipGirlState.State.SEND_NO_CO_TAM) {
+ NoCoTamMessage noCoTam = new NoCoTamMessage(
+ "",
+ 0,
+ state.gossipId,
+ state.theirGossipId,
+ state.getZoneTimestampsToSend(),
+ state.getQueryTimestampsToSend(),
+ state.hejkaSendTimestamp,
+ state.hejkaReceiveTimestamp
+ );
+ UDUPMessage udupMessage = new UDUPMessage("", 0, state.theirContact, noCoTam);
+ sendMessage(udupMessage);
+ state.sentNoCoTam();
}
} else {
System.out.println("ERROR: GossipGirl got state for a nonexistent gossip");
@@ -87,20 +133,60 @@ public class GossipGirl extends Module {
GossipGirlState state = gossipStates.get(message.getReceiverGossipId());
if (state != null) {
state.handleNoCoTam(message);
- for (ZMI zmi : state.getZMIsToSend()) {
- AttributesMessage attributesMessage = new AttributesMessage("", 0, zmi.getPathName(), zmi.getAttributes(), state.theirGossipId);
- UDUPMessage udupMessage = new UDUPMessage("", 0, state.theirContact, attributesMessage);
- sendMessage(udupMessage);
+ sendInfo(state);
+ } else {
+ System.out.println("ERROR: GossipGirl got state for a nonexistent gossip");
+ }
+ }
+
+ private void sendInfo(GossipGirlState state) throws InterruptedException {
+ for (ZMI zmi : state.getZMIsToSend()) {
+ AttributesMessage attributesMessage = new AttributesMessage("", 0, zmi.getPathName(), zmi.getAttributes(), state.theirGossipId);
+ UDUPMessage udupMessage = new UDUPMessage("", 0, state.theirContact, attributesMessage);
+ sendMessage(udupMessage);
+ }
+
+ for (Entry<Attribute, ValueQuery> query : state.getQueriesToSend()) {
+ QueryMessage queryMessage = new QueryMessage("", 0, query.getKey(), query.getValue(), state.theirGossipId);
+ UDUPMessage udupMessage = new UDUPMessage("", 0, state.theirContact, queryMessage);
+ sendMessage(udupMessage);
+ }
+ state.sentInfo();
+ }
+
+ private void handleAttributes(AttributesMessage message) throws InterruptedException {
+ GossipGirlState state = gossipStates.get(message.getReceiverGossipId());
+ if (state != null) {
+ state.gotAttributes(message);
+ if (state.state == GossipGirlState.State.SEND_INFO) {
+ sendInfo(state);
+ }
+ UpdateAttributesMessage updateMessage = new UpdateAttributesMessage("", 0, message.getPath().toString(), message.getAttributes());
+ sendMessage(updateMessage);
+ if (state.state == GossipGirlState.State.FINISHED) {
+ gossipStates.remove(message.getReceiverGossipId());
}
+ } else {
+ System.out.println("ERROR: GossipGirl got attributes for a nonexistent gossip");
+ }
+ }
- for (Entry<Attribute, ValueQuery> query : state.getQueriesToSend()) {
- QueryMessage queryMessage = new QueryMessage("", 0, query.getKey(), query.getValue(), state.theirGossipId);
- UDUPMessage udupMessage = new UDUPMessage("", 0, state.theirContact, queryMessage);
- sendMessage(udupMessage);
+ private void handleQuery(QueryMessage message) throws InterruptedException {
+ GossipGirlState state = gossipStates.get(message.getReceiverGossipId());
+ if (state != null) {
+ state.gotQuery(message.getName());
+ Map<Attribute, Entry<ValueQuery, ValueTime>> queries = new HashMap();
+ queries.put(
+ message.getName(),
+ new SimpleImmutableEntry(message.getQuery(), state.getTheirQueryTimestamp(message.getName()))
+ );
+ UpdateQueriesMessage updateMessage = new UpdateQueriesMessage("", 0, queries);
+ sendMessage(updateMessage);
+ if (state.state == GossipGirlState.State.FINISHED) {
+ gossipStates.remove(message.getReceiverGossipId());
}
- state.sentInfo();
} else {
- System.out.println("ERROR: GossipGirl got state for a nonexistent gossip");
+ System.out.println("ERROR: GossipGirl got query for a nonexistent gossip");
}
}
}
diff --git a/src/main/java/pl/edu/mimuw/cloudatlas/agent/modules/GossipGirlState.java b/src/main/java/pl/edu/mimuw/cloudatlas/agent/modules/GossipGirlState.java
index df17957..eafbcca 100644
--- a/src/main/java/pl/edu/mimuw/cloudatlas/agent/modules/GossipGirlState.java
+++ b/src/main/java/pl/edu/mimuw/cloudatlas/agent/modules/GossipGirlState.java
@@ -2,12 +2,16 @@ package pl.edu.mimuw.cloudatlas.agent.modules;
import java.util.AbstractMap.SimpleImmutableEntry;
import java.util.HashMap;
+import java.util.HashSet;
import java.util.Iterator;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;
+import java.util.Set;
+import pl.edu.mimuw.cloudatlas.agent.messages.AttributesMessage;
+import pl.edu.mimuw.cloudatlas.agent.messages.HejkaMessage;
import pl.edu.mimuw.cloudatlas.agent.messages.NoCoTamMessage;
import pl.edu.mimuw.cloudatlas.model.Attribute;
import pl.edu.mimuw.cloudatlas.model.PathName;
@@ -20,12 +24,16 @@ import pl.edu.mimuw.cloudatlas.model.ZMI;
public class GossipGirlState {
public enum State {
WAIT_FOR_STATE_INITIALIZER,
+ APPLY_HEJKA,
WAIT_FOR_STATE_RESPONDER,
SEND_HEJKA,
+ SEND_NO_CO_TAM,
SEND_INFO,
+ SEND_INFO_AND_FINISH,
WAIT_FOR_NO_CO_TAM,
WAIT_FOR_FIRST_INFO,
WAIT_FOR_INFO,
+ FINISHED,
ERROR
}
public PathName ourPath;
@@ -42,6 +50,10 @@ public class GossipGirlState {
public ValueTime noCoTamSendReceiveTimestamp;
private Map<PathName, ValueTime> theirZoneTimestamps;
private Map<Attribute, ValueTime> theirQueryTimestamps;
+ private List<PathName> zonesToSend;
+ private List<Attribute> queriesToSend;
+ private Set<PathName> waitingForZones;
+ private Set<Attribute> waitingForQueries;
public GossipGirlState(long gossipId, PathName ourPath, ValueContact theirContact, boolean initiating) {
this.gossipId = gossipId;
@@ -50,7 +62,7 @@ public class GossipGirlState {
if (initiating) {
state = State.WAIT_FOR_STATE_INITIALIZER;
} else {
- state = State.WAIT_FOR_STATE_RESPONDER;
+ state = State.APPLY_HEJKA;
}
}
@@ -64,7 +76,7 @@ public class GossipGirlState {
case WAIT_FOR_STATE_RESPONDER:
this.hierarchy = hierarchy;
this.queries = queries;
- state = State.WAIT_FOR_FIRST_INFO;
+ state = State.SEND_NO_CO_TAM;
break;
default:
System.out.println("ERROR: tried to set gossip state when not expected");
@@ -83,6 +95,33 @@ public class GossipGirlState {
}
}
+ public void sentNoCoTam() {
+ switch (state) {
+ case SEND_NO_CO_TAM:
+ state = state.WAIT_FOR_FIRST_INFO;
+ break;
+ default:
+ System.out.println("ERROR: tried to set gossip state when not expected");
+ state = State.ERROR;
+ }
+ }
+
+ public void handleHejka(HejkaMessage message) {
+ switch (state) {
+ case APPLY_HEJKA:
+ theirGossipId = message.getSenderGossipId();
+ theirZoneTimestamps = message.getZoneTimestamps();
+ theirQueryTimestamps = message.getQueryTimestamps();
+ hejkaSendTimestamp = message.getSentTimestamp();
+ hejkaReceiveTimestamp = message.getReceivedTimestamp();
+ state = State.WAIT_FOR_STATE_RESPONDER;
+ break;
+ default:
+ System.out.println("ERROR: tried to set gossip state when not expected");
+ state = State.ERROR;
+ }
+ }
+
public void handleNoCoTam(NoCoTamMessage message) {
switch (state) {
case WAIT_FOR_NO_CO_TAM:
@@ -91,6 +130,9 @@ public class GossipGirlState {
theirQueryTimestamps = message.getQueryTimestamps();
hejkaSendTimestamp = message.getHejkaSendTimestamp();
hejkaReceiveTimestamp = message.getHejkaReceiveTimestamp();
+ setZonesToSend();
+ setQueriesToSend();
+ setWaitingFor();
state = State.SEND_INFO;
break;
default:
@@ -99,6 +141,25 @@ public class GossipGirlState {
}
}
+ private void setWaitingFor() {
+ setWaitingForZones();
+ setWaitingForQueries();
+ }
+
+ private void setWaitingForZones() {
+ waitingForZones = new HashSet(theirZoneTimestamps.keySet());
+ for (PathName path : zonesToSend) {
+ waitingForZones.remove(path);
+ }
+ }
+
+ private void setWaitingForQueries() {
+ waitingForQueries = new HashSet(theirQueryTimestamps.keySet());
+ for (Attribute name : queriesToSend) {
+ waitingForQueries.remove(name);
+ }
+ }
+
public Map<PathName, ValueTime> getZoneTimestampsToSend() {
Map<PathName, ValueTime> timestamps = new HashMap();
collectZoneTimestamps(timestamps, hierarchy, theirContact.getName());
@@ -114,35 +175,48 @@ public class GossipGirlState {
return queryTimestamps;
}
- public List<ZMI> getZMIsToSend() {
- List<ZMI> zmis = new LinkedList();
+ public void setZonesToSend() {
+ zonesToSend = new LinkedList();
for (Entry<PathName, ValueTime> timestampedPath : getZoneTimestampsToSend().entrySet()) {
ValueTime theirTimestamp = theirZoneTimestamps.get(timestampedPath.getKey());
if (theirTimestamp == null || ValueUtils.valueLower(theirTimestamp, timestampedPath.getValue())) {
- System.out.println("going to send " + timestampedPath.getKey().toString());
- try {
- zmis.add(hierarchy.findDescendant(timestampedPath.getKey()));
- } catch (ZMI.NoSuchZoneException e) {
- System.out.println("ERROR: didn't find a zone we wanted to send in getZMIsToSend");
- }
+ zonesToSend.add(timestampedPath.getKey());
}
}
- return zmis;
}
- public List<Entry<Attribute, ValueQuery>> getQueriesToSend() {
- List<Entry<Attribute, ValueQuery>> queryList = new LinkedList();
+ public void setQueriesToSend() {
+ queriesToSend = new LinkedList();
for (Entry<Attribute, ValueTime> timestampedQuery : getQueryTimestampsToSend().entrySet()) {
ValueTime theirTimestamp = theirQueryTimestamps.get(timestampedQuery.getKey());
if (theirTimestamp == null || ValueUtils.valueLower(theirTimestamp, timestampedQuery.getValue())) {
- queryList.add(
- new SimpleImmutableEntry(
- timestampedQuery.getKey(),
- queries.get(timestampedQuery.getKey()).getKey()
- )
- );
+ queriesToSend.add(timestampedQuery.getKey());
}
}
+ }
+
+ public List<ZMI> getZMIsToSend() {
+ List<ZMI> zmis = new LinkedList();
+ for (PathName path : zonesToSend) {
+ try {
+ zmis.add(hierarchy.findDescendant(path));
+ } catch (ZMI.NoSuchZoneException e) {
+ System.out.println("ERROR: didn't find a zone we wanted to send in getZMIsToSend");
+ }
+ }
+ return zmis;
+ }
+
+ public List<Entry<Attribute, ValueQuery>> getQueriesToSend() {
+ List<Entry<Attribute, ValueQuery>> queryList = new LinkedList();
+ for (Attribute name : queriesToSend) {
+ queryList.add(
+ new SimpleImmutableEntry(
+ name,
+ queries.get(name).getKey()
+ )
+ );
+ }
return queryList;
}
@@ -189,9 +263,65 @@ public class GossipGirlState {
case SEND_INFO:
state = State.WAIT_FOR_INFO;
break;
+ case SEND_INFO_AND_FINISH:
+ state = State.FINISHED;
+ break;
default:
System.out.println("ERROR: tried to set gossip state when not expected");
state = State.ERROR;
}
}
+
+ public void gotAttributes(AttributesMessage message) {
+ switch (state) {
+ case WAIT_FOR_INFO:
+ if (!waitingForZones.remove(message.getPath())) {
+ System.out.println("DEBUG: got zone attributes we weren't expecting");
+ }
+ if (waitingForZones.isEmpty() && waitingForQueries.isEmpty()) {
+ System.out.println("INFO: done waiting for info");
+ state = state.FINISHED;
+ }
+ break;
+ case WAIT_FOR_FIRST_INFO:
+ // TODO: use offset to setup GTP
+ setZonesToSend();
+ setQueriesToSend();
+ setWaitingFor();
+ state = State.SEND_INFO;
+
+ if (!waitingForZones.remove(message.getPath())) {
+ System.out.println("DEBUG: got zone attributes we weren't expecting");
+ }
+ if (waitingForZones.isEmpty() && waitingForQueries.isEmpty()) {
+ System.out.println("INFO: done waiting for info");
+ state = state.SEND_INFO_AND_FINISH;
+ }
+ break;
+ default:
+ System.out.println("ERROR: got attributes when not expected");
+ state = State.ERROR;
+ }
+ }
+
+ public void gotQuery(Attribute name) {
+ switch (state) {
+ case WAIT_FOR_INFO:
+ if (!waitingForQueries.remove(name)) {
+ System.out.println("DEBUG: got query we weren't expecting");
+ }
+ if (waitingForZones.isEmpty() && waitingForQueries.isEmpty()) {
+ System.out.println("INFO: done waiting for info");
+ state = state.FINISHED;
+ }
+ break;
+ default:
+ System.out.println("ERROR: got query when not expected");
+ state = State.ERROR;
+ }
+ }
+
+ public ValueTime getTheirQueryTimestamp(Attribute name) {
+ return theirQueryTimestamps.get(name);
+ }
}