public static void testWriteView() throws Exception {
List<Address> members = new ArrayList<>();
View v;
Address a1 = Util.createRandomAddress();
Address a2 = Util.createRandomAddress();
Address a4 = Util.createRandomAddress();
ViewId vid = new ViewId(a1, 12345);
members.add(a1);
members.add(a2);
members.add(a4);
v = new View(vid, members);
ByteArrayOutputStream outstream = new ByteArrayOutputStream();
DataOutputStream dos = new DataOutputStream(outstream);
Util.writeGenericStreamable(v, dos);
Util.writeStreamable(v, dos);
dos.close();
byte[] buf = outstream.toByteArray();
ByteArrayInputStream instream = new ByteArrayInputStream(buf);
DataInputStream dis = new DataInputStream(instream);
View v2 = (View) Util.readGenericStreamable(dis);
Assert.assertEquals(v, v2);
v2 = (View) Util.readStreamable(View.class, dis);
Assert.assertEquals(v, v2);
}
public List<Integer> providedUpServices() {
List<Integer> ret = new ArrayList<Integer>(3);
ret.add(Event.FIND_INITIAL_MBRS);
ret.add(Event.FIND_ALL_VIEWS);
ret.add(Event.GET_PHYSICAL_ADDRESS);
return ret;
}
public static void testNewMembers() {
final Address a = Util.createRandomAddress(),
b = Util.createRandomAddress(),
c = Util.createRandomAddress(),
d = Util.createRandomAddress(),
e = Util.createRandomAddress();
List<Address> old = new ArrayList<>();
List<Address> new_list = new ArrayList<>();
old.add(a);
old.add(b);
old.add(c);
new_list.add(b);
new_list.add(a);
new_list.add(c);
new_list.add(d);
new_list.add(e);
System.out.println("old: " + old);
System.out.println("new: " + new_list);
List<Address> new_nodes = Util.newMembers(old, new_list);
System.out.println("new_nodes = " + new_nodes);
assert new_nodes.size() == 2 : "list should have d and e";
assert new_nodes.contains(d);
assert new_nodes.contains(e);
}
public static void testAll() {
List<String> l = new ArrayList<>();
l.add("one");
l.add("two");
l.add("one");
System.out.println("-- list is " + l);
assert !(Util.all(l, "one"));
l.remove("two");
System.out.println("-- list is " + l);
assert Util.all(l, "one");
}
public void up(MessageBatch batch) {
if (batch.dest() == null) { // not a unicast batch
up_prot.up(batch);
return;
}
int size = batch.size();
Map<Short, List<Message>> msgs =
new TreeMap<Short, List<Message>>(); // map of messages, keyed by conn-id
for (Message msg : batch) {
if (msg == null || msg.isFlagSet(Message.Flag.NO_RELIABILITY)) continue;
UnicastHeader hdr = (UnicastHeader) msg.getHeader(id);
if (hdr == null) continue;
batch.remove(msg); // remove the message from the batch, so it won't be passed up the stack
if (hdr.type != UnicastHeader.DATA) {
try {
handleUpEvent(msg.getSrc(), hdr);
} catch (Throwable t) { // we cannot let an exception terminate the processing of this batch
log.error(local_addr + ": failed handling event", t);
}
continue;
}
List<Message> list = msgs.get(hdr.conn_id);
if (list == null) msgs.put(hdr.conn_id, list = new ArrayList<Message>(size));
list.add(msg);
}
if (!msgs.isEmpty()) handleBatchReceived(batch.sender(), msgs); // process msgs:
if (!batch.isEmpty()) up_prot.up(batch);
}
protected List<PingData> read(InputStream in) {
List<PingData> retval = null;
try {
while (true) {
try {
String name_str = Util.readToken(in);
String uuid_str = Util.readToken(in);
String addr_str = Util.readToken(in);
String coord_str = Util.readToken(in);
if (name_str == null || uuid_str == null || addr_str == null || coord_str == null) break;
UUID uuid = null;
try {
long tmp = Long.valueOf(uuid_str);
uuid = new UUID(0, tmp);
} catch (Throwable t) {
uuid = UUID.fromString(uuid_str);
}
PhysicalAddress phys_addr = new IpAddress(addr_str);
boolean is_coordinator = coord_str.trim().equals("T") || coord_str.trim().equals("t");
if (retval == null) retval = new ArrayList<>();
retval.add(new PingData(uuid, true, name_str, phys_addr).coord(is_coordinator));
} catch (Throwable t) {
log.error(Util.getMessage("FailedReadingLineOfInputStream"), t);
}
}
return retval;
} finally {
Util.close(in);
}
}
/**
* Computes the next view. Returns a copy that has <code>old_mbrs</code> and <code>suspected_mbrs
* </code> removed and <code>new_mbrs</code> added.
*/
public View getNextView(
Collection<Address> new_mbrs,
Collection<Address> old_mbrs,
Collection<Address> suspected_mbrs) {
synchronized (members) {
ViewId view_id = view != null ? view.getViewId() : null;
if (view_id == null) {
log.error("view_id is null");
return null; // this should *never* happen !
}
long vid = Math.max(view_id.getId(), ltime) + 1;
ltime = vid;
Membership tmp_mbrs = tmp_members.copy(); // always operate on the temporary membership
tmp_mbrs.remove(suspected_mbrs);
tmp_mbrs.remove(old_mbrs);
tmp_mbrs.add(new_mbrs);
List<Address> mbrs = tmp_mbrs.getMembers();
Address new_coord = local_addr;
if (!mbrs.isEmpty()) new_coord = mbrs.get(0);
View v = new View(new_coord, vid, mbrs);
// Update membership (see DESIGN for explanation):
tmp_members.set(mbrs);
// Update joining list (see DESIGN for explanation)
if (new_mbrs != null) {
for (Address tmp_mbr : new_mbrs) {
if (!joining.contains(tmp_mbr)) joining.add(tmp_mbr);
}
}
// Update leaving list (see DESIGN for explanations)
if (old_mbrs != null) {
for (Address addr : old_mbrs) {
if (!leaving.contains(addr)) leaving.add(addr);
}
}
if (suspected_mbrs != null) {
for (Address addr : suspected_mbrs) {
if (!leaving.contains(addr)) leaving.add(addr);
}
}
return v;
}
}
/**
* Add a new channel listener to be notified on the channel's state change.
*
* @return true if the listener was added or false if the listener was already in the list.
*/
public boolean addChannelListener(ChannelListener l) {
synchronized (additionalChannelListeners) {
if (additionalChannelListeners.contains(l)) {
return false;
}
additionalChannelListeners.add(l);
return true;
}
}
public static void testPickRandomElement() {
List<Integer> v = new ArrayList<>();
for (int i = 0; i < 10; i++) {
v.add(i);
}
Integer el;
for (int i = 0; i < 10000; i++) {
el = Util.pickRandomElement(v);
assert el >= 0 && el < 10;
}
}
protected void _handleMergeRequest(
Address sender, MergeId merge_id, Collection<? extends Address> mbrs) throws Exception {
boolean success = matchMergeId(merge_id) || setMergeId(null, merge_id);
if (!success)
throw new Exception(
"merge " + this.merge_id + " is already in progress, received merge-id=" + merge_id);
/* Clears the view handler queue and discards all JOIN/LEAVE/MERGE requests until after the MERGE */
// gms.getViewHandler().suspend();
if (log.isTraceEnabled())
log.trace(
gms.local_addr
+ ": got merge request from "
+ sender
+ ", merge_id="
+ merge_id
+ ", mbrs="
+ mbrs);
// merge the membership of the current view with mbrs
List<Address> members = new LinkedList<Address>();
if (mbrs
!= null) { // didn't use a set because we didn't want to change the membership order at this
// time (although not incorrect)
for (Address mbr : mbrs) {
if (!members.contains(mbr)) members.add(mbr);
}
}
ViewId tmp_vid = gms.getViewId();
if (tmp_vid != null) tmp_vid = tmp_vid.copy();
if (tmp_vid == null) throw new Exception("view ID is null; cannot return merge response");
View view = new View(tmp_vid, new ArrayList<Address>(members));
// [JGRP-524] - FLUSH and merge: flush doesn't wrap entire merge process
// [JGRP-770] - Concurrent startup of many channels doesn't stabilize
// [JGRP-700] - FLUSH: flushing should span merge
/*if flush is in stack, let this coordinator flush its cluster island */
if (gms.flushProtocolInStack && !gms.startFlush(view)) throw new Exception("flush failed");
// we still need to fetch digests from all members, and not just return our own digest
// (https://issues.jboss.org/browse/JGRP-948)
Digest digest = fetchDigestsFromAllMembersInSubPartition(members, merge_id);
if (digest == null || digest.size() == 0)
throw new Exception(
"failed fetching digests from subpartition members; dropping merge response");
sendMergeResponse(sender, view, digest, merge_id);
}
public static void testReadLine() throws IOException {
final String input = " hello world\nthis is \r\n just an example\r\nthis is line 2 \r\n";
String line;
InputStream in = new BufferedInputStream(new ByteArrayInputStream(input.getBytes()));
List<String> list = new ArrayList<>(4);
for (int i = 0; i < 4; i++) {
line = Util.readLine(in);
System.out.println("line = \"" + line + "\"");
list.add(line);
}
assert list.size() == 4;
}
/**
* Merge all MergeData. All MergeData elements should be disjunct (both views and digests).
* However, this method is prepared to resolve duplicate entries (for the same member).
* Resolution strategy for views is to merge only 1 of the duplicate members. Resolution
* strategy for digests is to take the higher seqnos for duplicate digests.
*
* <p>After merging all members into a Membership and subsequent sorting, the first member of
* the sorted membership will be the new coordinator. This method has a lock on merge_rsps.
*
* @param merge_rsps A list of MergeData items. Elements with merge_rejected=true were removed
* before. Is guaranteed not to be null and to contain at least 1 member.
*/
private MergeData consolidateMergeData(List<MergeData> merge_rsps) {
long logical_time = 0; // for new_vid
List<View> subgroups =
new ArrayList<View>(11); // contains a list of Views, each View is a subgroup
Collection<Collection<Address>> sub_mbrships = new ArrayList<Collection<Address>>();
for (MergeData tmp_data : merge_rsps) {
View tmp_view = tmp_data.getView();
if (tmp_view != null) {
ViewId tmp_vid = tmp_view.getVid();
if (tmp_vid != null) {
// compute the new view id (max of all vids +1)
logical_time = Math.max(logical_time, tmp_vid.getId());
}
// merge all membership lists into one (prevent duplicates)
sub_mbrships.add(new ArrayList<Address>(tmp_view.getMembers()));
subgroups.add(tmp_view.copy());
}
}
// determine the new digest
Digest new_digest = consolidateDigests(merge_rsps, merge_rsps.size());
if (new_digest == null) return null;
// remove all members from the new member list that are not in the digest
Collection<Address> digest_mbrs = new_digest.getMembers();
for (Collection<Address> coll : sub_mbrships) coll.retainAll(digest_mbrs);
List<Address> merged_mbrs = gms.computeNewMembership(sub_mbrships);
// the new coordinator is the first member of the consolidated & sorted membership list
Address new_coord = merged_mbrs.isEmpty() ? null : merged_mbrs.get(0);
if (new_coord == null) return null;
// should be the highest view ID seen up to now plus 1
ViewId new_vid = new ViewId(new_coord, logical_time + 1);
// determine the new view
MergeView new_view = new MergeView(new_vid, merged_mbrs, subgroups);
if (log.isTraceEnabled())
log.trace(
gms.local_addr
+ ": consolidated view="
+ new_view
+ "\nconsolidated digest="
+ new_digest);
return new MergeData(gms.local_addr, new_view, new_digest);
}
public static void testLeftMembers2() {
final Address a = Util.createRandomAddress(),
b = Util.createRandomAddress(),
c = Util.createRandomAddress(),
d = Util.createRandomAddress();
List<Address> v1 = new ArrayList<>();
v1.add(a);
v1.add(b);
v1.add(c);
v1.add(d);
List<Address> v2 = new ArrayList<>();
v2.add(c);
v2.add(d);
v2.add(a);
v2.add(b);
View one = new View(new ViewId(a, 1), v1), two = new View(new ViewId(b, 2), v2);
List<Address> left = View.leftMembers(one, two);
System.out.println("left = " + left);
assert left != null;
assert left.isEmpty();
}
public static void testPickNext() {
List<Integer> list = new ArrayList<>(10);
for (int i = 0; i < 10; i++) list.add(i);
Integer num = Util.pickNext(list, 5);
System.out.println("number next to 5: " + num);
assert num != null;
assert num.equals(6);
num = Util.pickNext(list, 9);
System.out.println("number next to 9: " + num);
assert num != null;
assert num.equals(0);
num = Util.pickNext(list, 11);
assert num == null;
}
@ManagedOperation(description = "Reads data from local caches and dumps them to a file")
public void dumpCache(String output_filename) throws Exception {
Map<Address, PhysicalAddress> cache_contents =
(Map<Address, PhysicalAddress>)
down_prot.down(new Event(Event.GET_LOGICAL_PHYSICAL_MAPPINGS, false));
List<PingData> list = new ArrayList<>(cache_contents.size());
for (Map.Entry<Address, PhysicalAddress> entry : cache_contents.entrySet()) {
Address addr = entry.getKey();
PhysicalAddress phys_addr = entry.getValue();
PingData data =
new PingData(addr, true, UUID.get(addr), phys_addr).coord(addr.equals(local_addr));
list.add(data);
}
OutputStream out = new FileOutputStream(output_filename);
write(list, out);
}
protected void startStack(String cluster_name) throws Exception {
/*make sure the channel is not closed*/
checkClosed();
/*make sure we have a valid channel name*/
if (cluster_name == null) log.debug("cluster_name is null, assuming unicast channel");
else this.cluster_name = cluster_name;
if (socket_factory != null) prot_stack.getTopProtocol().setSocketFactory(socket_factory);
prot_stack.startStack(
cluster_name, local_addr); // calls start() in all protocols, from top to bottom
/*create a temporary view, assume this channel is the only member and is the coordinator*/
List<Address> t = new ArrayList<>(1);
t.add(local_addr);
my_view = new View(local_addr, 0, t); // create a dummy view
TP transport = prot_stack.getTransport();
transport.registerProbeHandler(probe_handler);
}
public void run() {
long end_time, wait_time;
List<Request> requests = new LinkedList<Request>();
while (Thread.currentThread().equals(thread) && !suspended) {
try {
boolean keepGoing = false;
end_time = System.currentTimeMillis() + max_bundling_time;
do {
Request firstRequest =
(Request)
queue.remove(INTERVAL); // throws a TimeoutException if it runs into timeout
requests.add(firstRequest);
if (!view_bundling) break;
if (queue.size() > 0) {
Request nextReq = (Request) queue.peek();
keepGoing = view_bundling && firstRequest.canBeProcessedTogether(nextReq);
} else {
wait_time = end_time - System.currentTimeMillis();
if (wait_time > 0)
queue.waitUntilClosed(
wait_time); // misnomer: waits until element has been added or q closed
keepGoing =
queue.size() > 0 && firstRequest.canBeProcessedTogether((Request) queue.peek());
}
} while (keepGoing && System.currentTimeMillis() < end_time);
try {
process(requests);
} finally {
requests.clear();
}
} catch (QueueClosedException e) {
break;
} catch (TimeoutException e) {
break;
} catch (Throwable catchall) {
Util.sleep(50);
}
}
}
protected void handleMessage(Message msg) throws Exception {
Address dest = msg.getDest();
long len;
List tmp;
len = msg.size(); // todo: use msg.getLength() instead of msg.getSize()
if (len > max_bundle_size) {
throw new Exception(
"UDP.BundlingOutgoingPacketHandler.handleMessage(): "
+ "message size ("
+ len
+ ") is greater than UDP fragmentation size. "
+ "Set the fragmentation/bundle size in FRAG and UDP correctly");
}
if (total_bytes + len >= max_bundle_size) {
if (Trace.trace) {
Trace.info(
"UDP.BundlingOutgoingPacketHandler.handleMessage()",
"sending " + total_bytes + " bytes");
}
bundleAndSend(); // send all pending message and clear table
total_bytes = 0;
}
synchronized (msgs) {
tmp = (List) msgs.get(dest);
if (tmp == null) {
tmp = new List();
msgs.put(dest, tmp);
}
tmp.add(msg);
total_bytes += len;
}
if (!timer_running) { // first message to be bundled
startTimer();
}
}
public void addResponse(PingData rsp, boolean overwrite) {
if (rsp == null) return;
promise.getLock().lock();
try {
if (overwrite) ping_rsps.remove(rsp);
// https://jira.jboss.org/jira/browse/JGRP-1179
int index = ping_rsps.indexOf(rsp);
if (index == -1) {
ping_rsps.add(rsp);
promise.getCond().signalAll();
} else if (rsp.isCoord()) {
PingData pr = ping_rsps.get(index);
// Check if the already existing element is not server
if (!pr.isCoord()) {
ping_rsps.set(index, rsp);
promise.getCond().signalAll();
}
}
} finally {
promise.getLock().unlock();
}
}
protected <T> GroupRequest<T> cast(
final Collection<Address> dests,
Message msg,
RequestOptions options,
boolean block_for_results,
FutureListener<RspList<T>> listener)
throws Exception {
if (msg.getDest() != null && !(msg.getDest() instanceof AnycastAddress))
throw new IllegalArgumentException("message destination is non-null, cannot send message");
if (options != null) {
msg.setFlag(options.getFlags()).setTransientFlag(options.getTransientFlags());
if (options.getScope() > 0) msg.setScope(options.getScope());
}
List<Address> real_dests;
// we need to clone because we don't want to modify the original
if (dests != null) {
real_dests = new ArrayList<Address>();
for (Address dest : dests) {
if (dest instanceof SiteAddress || this.members.contains(dest)) {
if (!real_dests.contains(dest)) real_dests.add(dest);
}
}
} else real_dests = new ArrayList<Address>(members);
// if local delivery is off, then we should not wait for the message from the local member.
// therefore remove it from the membership
Channel tmp = channel;
if ((tmp != null && tmp.getDiscardOwnMessages())
|| msg.isTransientFlagSet(Message.TransientFlag.DONT_LOOPBACK)) {
if (local_addr == null) local_addr = tmp != null ? tmp.getAddress() : null;
if (local_addr != null) real_dests.remove(local_addr);
}
if (options != null && options.hasExclusionList()) {
Address[] exclusion_list = options.exclusionList();
for (Address excluding : exclusion_list) real_dests.remove(excluding);
}
// don't even send the message if the destination list is empty
if (log.isTraceEnabled()) log.trace("real_dests=" + real_dests);
if (real_dests.isEmpty()) {
if (log.isTraceEnabled()) log.trace("destination list is empty, won't send message");
return null;
}
if (options != null) {
boolean async = options.getMode() == ResponseMode.GET_NONE;
if (options.getAnycasting()) {
if (async) async_anycasts.incrementAndGet();
else sync_anycasts.incrementAndGet();
} else {
if (async) async_multicasts.incrementAndGet();
else sync_multicasts.incrementAndGet();
}
}
GroupRequest<T> req = new GroupRequest<T>(msg, corr, real_dests, options);
if (listener != null) req.setListener(listener);
if (options != null) {
req.setResponseFilter(options.getRspFilter());
req.setAnycasting(options.getAnycasting());
}
req.setBlockForResults(block_for_results);
req.execute();
return req;
}
/**
* Get the view and digest and send back both (MergeData) in the form of a MERGE_RSP to the
* sender. If a merge is already in progress, send back a MergeData with the merge_rejected field
* set to true.
*
* @param sender The address of the merge leader
* @param merge_id The merge ID
* @param mbrs The set of members from which we expect responses
*/
public void handleMergeRequest(
Address sender, MergeId merge_id, Collection<? extends Address> mbrs) {
boolean success = matchMergeId(merge_id) || setMergeId(null, merge_id);
if (!success) {
if (log.isWarnEnabled()) log.warn(gms.local_addr + ": merge is already in progress");
sendMergeRejectedResponse(sender, merge_id);
return;
}
/* Clears the view handler queue and discards all JOIN/LEAVE/MERGE requests until after the MERGE */
gms.getViewHandler().suspend(merge_id);
if (log.isDebugEnabled())
log.debug(
gms.local_addr
+ ": got merge request from "
+ sender
+ ", merge_id="
+ merge_id
+ ", mbrs="
+ mbrs);
// merge the membership of the current view with mbrs
List<Address> members = new LinkedList<Address>();
if (mbrs
!= null) { // didn't use a set because we didn't want to change the membership order at this
// time (although not incorrect)
for (Address mbr : mbrs) {
if (!members.contains(mbr)) members.add(mbr);
}
}
ViewId tmp_vid = gms.view_id != null ? gms.view_id.copy() : null;
if (tmp_vid == null) {
log.warn("view ID is null; cannot return merge response");
sendMergeRejectedResponse(sender, merge_id);
return;
}
View view = new View(tmp_vid, new Vector<Address>(members));
// [JGRP-524] - FLUSH and merge: flush doesn't wrap entire merge process
// [JGRP-770] - Concurrent startup of many channels doesn't stabilize
// [JGRP-700] - FLUSH: flushing should span merge
/*if flush is in stack, let this coordinator flush its cluster island */
boolean successfulFlush = gms.startFlush(view);
if (!successfulFlush) {
sendMergeRejectedResponse(sender, merge_id);
if (log.isWarnEnabled())
log.warn(
gms.local_addr
+ ": flush failed; sending merge rejected message to "
+ sender
+ ", merge_id="
+ merge_id);
cancelMerge(merge_id);
return;
}
Digest digest = fetchDigestsFromAllMembersInSubPartition(members);
if (digest.size() == 0) {
log.error("failed fetching digests from subpartition members; dropping merge response");
return;
}
sendMergeResponse(sender, view, digest, merge_id);
}
/**
* Sets the new {@link AddressGenerator}. New addresses will be generated using the new generator.
* This should <em>not</em> be done while a channel is connected, but before connecting.
*
* @param address_generator
* @since 2.12
*/
public void addAddressGenerator(AddressGenerator address_generator) {
if (address_generator == null) return;
if (address_generators == null) address_generators = new ArrayList<>(3);
address_generators.add(address_generator);
}
@SuppressWarnings("unchecked")
public void testObjectToFromByteBuffer() throws Exception {
byte[] buf;
Address addr = Util.createRandomAddress(), addr2;
List<String> list = new ArrayList<>(), list2;
list.add("Bela");
list.add("Jeannette");
buf = Util.objectToByteBuffer(addr);
addr2 = (Address) Util.objectFromByteBuffer(buf);
System.out.println("addr=" + addr + ", addr2=" + addr2);
Assert.assertEquals(addr, addr2);
buf = Util.objectToByteBuffer(list);
list2 = (List<String>) Util.objectFromByteBuffer(buf);
System.out.println("list=" + list + ", list2=" + list2);
Assert.assertEquals(list, list2);
byte[] buffer = {'B', 'e', 'l', 'a', ' ', 'B', 'a', 'n'};
buf = Util.objectToByteBuffer(buffer);
byte[] buffer2 = (byte[]) Util.objectFromByteBuffer(buf);
assert buffer2 != null && buffer.length == buffer2.length;
assert Arrays.equals(buffer, buffer2);
Object obj = null;
buf = Util.objectToByteBuffer(obj);
assert buf != null;
assert buf.length > 0;
obj = Util.objectFromByteBuffer(buf);
assert obj == null;
Object[] values = {
Boolean.TRUE,
true,
false,
Boolean.FALSE,
(byte) 22,
new Byte("2"),
'5',
3.14,
352.3f,
0,
100,
322649,
Integer.MAX_VALUE,
Integer.MIN_VALUE,
0L,
322649L,
Long.MAX_VALUE - 50,
Long.MAX_VALUE,
Long.MIN_VALUE,
(short) 22,
Short.MAX_VALUE,
Short.MIN_VALUE,
"Bela Ban",
new byte[] {'H', 'e', 'l', 'l', 'o'},
Util.generateArray(1024)
};
for (int i = 0; i < values.length; i++) {
Object value = values[i];
marshal(value);
}
}