Example #1
0
  /**
   * If merge_id is not equal to this.merge_id then discard. Else cast the view/digest to all
   * members of this group.
   */
  public void handleMergeView(final MergeData data, final MergeId merge_id) {
    if (!matchMergeId(merge_id)) {
      if (log.isErrorEnabled())
        log.error("merge_ids don't match (or are null); merge view discarded");
      return;
    }

    // only send to our *current* members, if we have A and B being merged (we are B), then we would
    // *not*
    // receive a VIEW_ACK from A because A doesn't see us in the pre-merge view yet and discards the
    // view

    // [JGRP-700] - FLUSH: flushing should span merge

    // we have to send new view only to current members and we should not wait
    // for view acks from newly merged mebers
    List<Address> newViewMembers = new Vector<Address>(data.view.getMembers());
    newViewMembers.removeAll(gms.members.getMembers());

    gms.castViewChangeWithDest(data.view, data.digest, null, newViewMembers);
    // if we have flush in stack send ack back to merge coordinator
    if (gms.flushProtocolInStack) {
      Message ack = new Message(data.getSender(), null, null);
      ack.setFlag(Message.OOB);
      GMS.GmsHeader ack_hdr = new GMS.GmsHeader(GMS.GmsHeader.INSTALL_MERGE_VIEW_OK);
      ack.putHeader(gms.getId(), ack_hdr);
      gms.getDownProtocol().down(new Event(Event.MSG, ack));
    }
    cancelMerge(merge_id);
  }
Example #2
0
  /**
   * Processes a packet read from either the multicast or unicast socket. Needs to be synchronized
   * because mcast or unicast socket reads can be concurrent
   */
  void handleIncomingUdpPacket(byte[] data) {
    ByteArrayInputStream inp_stream;
    ObjectInputStream inp;
    Message msg = null;
    List l; // used if bundling is enabled

    try {
      // skip the first n bytes (default: 4), this is the version info
      inp_stream = new ByteArrayInputStream(data, VERSION_LENGTH, data.length - VERSION_LENGTH);
      inp = new ObjectInputStream(inp_stream);
      if (enable_bundling) {
        l = new List();
        l.readExternal(inp);
        for (Enumeration en = l.elements(); en.hasMoreElements(); ) {
          msg = (Message) en.nextElement();
          try {
            handleMessage(msg);
          } catch (Throwable t) {
            Trace.error("UDP.handleIncomingUdpPacket()", "failure: " + t.toString());
          }
        }
      } else {
        msg = new Message();
        msg.readExternal(inp);
        handleMessage(msg);
      }
    } catch (Throwable e) {
      Trace.error("UDP.handleIncomingUdpPacket()", "exception=" + Trace.getStackTrace(e));
    }
  }
Example #3
0
  /**
   * An event is to be sent down the stack. The layer may want to examine its type and perform some
   * action on it, depending on the event's type. If the event is a message MSG, then the layer may
   * need to add a header to it (or do nothing at all) before sending it down the stack using <code>
   * PassDown</code>. In case of a GET_ADDRESS event (which tries to retrieve the stack's address
   * from one of the bottom layers), the layer may need to send a new response event back up the
   * stack using <code>up_prot.up()</code>. The PING protocol is interested in several different
   * down events, Event.FIND_INITIAL_MBRS - sent by the GMS layer and expecting a GET_MBRS_OK
   * Event.TMP_VIEW and Event.VIEW_CHANGE - a view change event Event.BECOME_SERVER - called after
   * client has joined and is fully working group member Event.CONNECT, Event.DISCONNECT.
   */
  @SuppressWarnings("unchecked")
  public Object down(Event evt) {

    switch (evt.getType()) {
      case Event.FIND_INITIAL_MBRS: // sent by GMS layer
      case Event.FIND_ALL_VIEWS:
        // sends the GET_MBRS_REQ to all members, waits 'timeout' ms or until 'num_initial_members'
        // have been retrieved
        long start = System.currentTimeMillis();
        boolean find_all_views = evt.getType() == Event.FIND_ALL_VIEWS;
        Promise<JoinRsp> promise = (Promise<JoinRsp>) evt.getArg();
        List<PingData> rsps = find_all_views ? findAllViews(promise) : findInitialMembers(promise);
        long diff = System.currentTimeMillis() - start;
        if (log.isTraceEnabled())
          log.trace("discovery took " + diff + " ms: responses: " + Util.printPingData(rsps));
        return rsps;

      case Event.TMP_VIEW:
      case Event.VIEW_CHANGE:
        List<Address> tmp;
        view = (View) evt.getArg();
        if ((tmp = view.getMembers()) != null) {
          synchronized (members) {
            members.clear();
            members.addAll(tmp);
          }
        }
        current_coord = !members.isEmpty() ? members.get(0) : null;
        is_coord = current_coord != null && local_addr != null && current_coord.equals(local_addr);

        return down_prot.down(evt);

      case Event.BECOME_SERVER: // called after client has joined and is fully working group member
        down_prot.down(evt);
        is_server = true;
        return null;

      case Event.SET_LOCAL_ADDRESS:
        local_addr = (Address) evt.getArg();
        return down_prot.down(evt);

      case Event.CONNECT:
      case Event.CONNECT_WITH_STATE_TRANSFER:
      case Event.CONNECT_USE_FLUSH:
      case Event.CONNECT_WITH_STATE_TRANSFER_USE_FLUSH:
        is_leaving = false;
        group_addr = (String) evt.getArg();
        Object ret = down_prot.down(evt);
        handleConnect();
        return ret;

      case Event.DISCONNECT:
        is_leaving = true;
        handleDisconnect();
        return down_prot.down(evt);

      default:
        return down_prot.down(evt); // Pass on to the layer below us
    }
  }
Example #4
0
  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);
  }
Example #5
0
  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);
  }
Example #6
0
  protected Address generateAddress() {
    if (address_generators == null || address_generators.isEmpty()) return UUID.randomUUID();
    if (address_generators.size() == 1) return address_generators.get(0).generateAddress();

    // at this point we have multiple AddressGenerators installed
    Address[] addrs = new Address[address_generators.size()];
    for (int i = 0; i < addrs.length; i++) addrs[i] = address_generators.get(i).generateAddress();

    for (int i = 0; i < addrs.length; i++) {
      if (!(addrs[i] instanceof ExtendedUUID)) {
        log.error(
            "address generator %s does not subclass %s which is required if multiple address generators "
                + "are installed, removing it",
            addrs[i].getClass().getSimpleName(), ExtendedUUID.class.getSimpleName());
        addrs[i] = null;
      }
    }
    ExtendedUUID uuid = null;
    for (int i = 0; i < addrs.length; i++) { // we only have ExtendedUUIDs in addrs
      if (addrs[i] != null) {
        if (uuid == null) uuid = (ExtendedUUID) addrs[i];
        else uuid.addContents((ExtendedUUID) addrs[i]);
      }
    }
    return uuid != null ? uuid : UUID.randomUUID();
  }
Example #7
0
 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;
 }
Example #8
0
  /**
   * Disseminates cache information (UUID/IP adddress/port/name) to the given members
   *
   * @param current_mbrs The current members. Guaranteed to be non-null. This is a copy and can be
   *     modified.
   * @param left_mbrs The members which left. These are excluded from dissemination. Can be null if
   *     no members left
   * @param new_mbrs The new members that we need to disseminate the information to. Will be all
   *     members if null.
   */
  protected void disseminateDiscoveryInformation(
      List current_mbrs, List<Address> left_mbrs, List<Address> new_mbrs) {
    if (new_mbrs == null || new_mbrs.isEmpty()) return;

    if (local_addr != null) current_mbrs.remove(local_addr);
    if (left_mbrs != null) current_mbrs.removeAll(left_mbrs);

    // 1. Send information about <everyone - self - left_mbrs> to new_mbrs
    Set<Address> info = new HashSet<>(current_mbrs);
    for (Address addr : info) {
      PhysicalAddress phys_addr =
          (PhysicalAddress) down_prot.down(new Event(Event.GET_PHYSICAL_ADDRESS, addr));
      if (phys_addr == null) continue;
      boolean is_coordinator = isCoord(addr);
      for (Address target : new_mbrs)
        sendDiscoveryResponse(addr, phys_addr, UUID.get(addr), target, is_coordinator);
    }

    // 2. Send information about new_mbrs to <everyone - self - left_mbrs - new_mbrs>
    Set<Address> targets = new HashSet<>(current_mbrs);
    targets.removeAll(new_mbrs);

    if (!targets.isEmpty()) {
      for (Address addr : new_mbrs) {
        PhysicalAddress phys_addr =
            (PhysicalAddress) down_prot.down(new Event(Event.GET_PHYSICAL_ADDRESS, addr));
        if (phys_addr == null) continue;
        boolean is_coordinator = isCoord(addr);
        for (Address target : targets)
          sendDiscoveryResponse(addr, phys_addr, UUID.get(addr), target, is_coordinator);
      }
    }
  }
Example #9
0
  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);
    }
  }
Example #10
0
  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);
  }
Example #11
0
  protected final void init(ProtocolStackConfigurator configurator) throws Exception {
    List<ProtocolConfiguration> configs = configurator.getProtocolStack();
    // replace vars with system props
    configs.forEach(ProtocolConfiguration::substituteVariables);

    prot_stack = new ProtocolStack(this);
    prot_stack.setup(configs); // Setup protocol stack (creates protocol, calls init() on them)
  }
Example #12
0
 public static void testParseSemicolonDelimitedString() {
   String input = "one;two ; three; four ; five;six";
   List list = Util.parseStringList(input, ";");
   System.out.println("list: " + list);
   Assert.assertEquals(6, list.size());
   Assert.assertEquals("one", list.get(0));
   Assert.assertEquals("six", list.get(list.size() - 1));
 }
Example #13
0
 public static void testParseSemicolonDelimitedString2() {
   String input = "  myID1::subID1 ; myID2::mySubID2; myID3 ;myID4::blaSubID4";
   List list = Util.parseStringList(input, ";");
   System.out.println("list: " + list);
   Assert.assertEquals(4, list.size());
   Assert.assertEquals("myID1::subID1", list.get(0));
   Assert.assertEquals("myID4::blaSubID4", list.get(list.size() - 1));
 }
Example #14
0
 public String dumpQueue() {
   StringBuilder sb = new StringBuilder();
   List v = queue.values();
   for (Iterator it = v.iterator(); it.hasNext(); ) {
     sb.append(it.next() + "\n");
   }
   return sb.toString();
 }
Example #15
0
 /**
  * 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;
   }
 }
Example #16
0
  public static void testParseCommaDelimitedString() {
    String input = "1,2,3,4,5,6,7,8,9,10 , 11, 12 ,13";

    List list = Util.parseCommaDelimitedStrings(input);
    System.out.println("list: " + list);
    Assert.assertEquals(13, list.size());
    Assert.assertEquals("1", list.get(0));
    Assert.assertEquals("13", list.get(list.size() - 1));
  }
Example #17
0
 @ManagedOperation(description = "Runs the discovery protocol to find initial members")
 public String findInitialMembersAsString() {
   List<PingData> results = findInitialMembers(null);
   if (results == null || results.isEmpty()) return "<empty>";
   StringBuilder sb = new StringBuilder();
   for (PingData rsp : results) {
     sb.append(rsp).append("\n");
   }
   return sb.toString();
 }
Example #18
0
 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");
 }
Example #19
0
 @ManagedOperation(description = "Runs the discovery protocol to find all views")
 public String findAllViewsAsString() {
   List<PingData> rsps = findAllViews(null);
   if (rsps == null || rsps.isEmpty()) return "<empty>";
   StringBuilder sb = new StringBuilder();
   for (PingData data : rsps) {
     View v = data.getView();
     if (v != null) sb.append(v).append("\n");
   }
   return sb.toString();
 }
Example #20
0
  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;
    }
  }
Example #21
0
  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);
  }
Example #22
0
  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;
  }
Example #23
0
  private void handleViewChange(View view) {
    List<Address> new_mbrs = view.getMembers();
    List<Address> left_mbrs = Util.determineLeftMembers(members, new_mbrs);
    members.clear();
    members.addAll(new_mbrs);

    for (Address mbr : left_mbrs) {
      // the new view doesn't contain the sender, it must have left,
      // hence we will clear all of itsfragmentation tables
      fragment_list.remove(mbr);
      if (log.isTraceEnabled())
        log.trace("[VIEW_CHANGE] removed " + mbr + " from fragmentation table");
    }
  }
Example #24
0
 protected String printMessageList(List<Message> list) {
   StringBuilder sb = new StringBuilder();
   int size = list.size();
   Message first = size > 0 ? list.get(0) : null, second = size > 1 ? list.get(size - 1) : first;
   UnicastHeader hdr;
   if (first != null) {
     hdr = (UnicastHeader) first.getHeader(id);
     if (hdr != null) sb.append("#" + hdr.seqno);
   }
   if (second != null) {
     hdr = (UnicastHeader) second.getHeader(id);
     if (hdr != null) sb.append(" - #" + hdr.seqno);
   }
   return sb.toString();
 }
Example #25
0
 String dumpMessages(HashMap map) {
   StringBuffer sb = new StringBuffer();
   Map.Entry entry;
   List l;
   if (map != null) {
     synchronized (map) {
       for (Iterator it = map.entrySet().iterator(); it.hasNext(); ) {
         entry = (Map.Entry) it.next();
         l = (List) entry.getValue();
         sb.append(entry.getKey()).append(": ");
         sb.append(l.size()).append(" msgs\n");
       }
     }
   }
   return sb.toString();
 }
Example #26
0
  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;
  }
Example #27
0
    public List<PingData> get(long timeout) throws InterruptedException {
      long start_time = System.currentTimeMillis(), time_to_wait = timeout;

      promise.getLock().lock();
      try {
        while (time_to_wait > 0 && !promise.hasResult()) {
          // if num_expected_srv_rsps > 0, then it overrides num_expected_rsps
          if (num_expected_srv_rsps > 0) {
            int received_srv_rsps = getNumServerResponses(ping_rsps);
            if (received_srv_rsps >= num_expected_srv_rsps)
              return new LinkedList<PingData>(ping_rsps);
          } else if (ping_rsps.size() >= num_expected_rsps) {
            return new LinkedList<PingData>(ping_rsps);
          }

          if (break_on_coord_rsp && containsCoordinatorResponse(ping_rsps))
            return new LinkedList<PingData>(ping_rsps);

          promise.getCond().await(time_to_wait, TimeUnit.MILLISECONDS);
          time_to_wait = timeout - (System.currentTimeMillis() - start_time);
        }
        return new LinkedList<PingData>(ping_rsps);
      } finally {
        promise.getLock().unlock();
      }
    }
Example #28
0
 public Responses findMembers(
     final List<Address> members, final boolean initial_discovery, boolean async) {
   num_discovery_requests++;
   int num_expected = members != null ? members.size() : 0;
   int capacity = members != null ? members.size() : 16;
   final Responses rsps =
       new Responses(num_expected, initial_discovery && break_on_coord_rsp, capacity);
   synchronized (ping_responses) {
     ping_responses.put(System.nanoTime(), rsps);
   }
   if (async || async_discovery)
     timer.execute(() -> findMembers(members, initial_discovery, rsps));
   else findMembers(members, initial_discovery, rsps);
   weedOutCompletedDiscoveryResponses();
   return rsps;
 }
Example #29
0
    void bundleAndSend() {
      Map.Entry entry;
      IpAddress dest;
      ObjectOutputStream out;
      InetAddress addr;
      int port;
      byte[] data;
      List l;

      if (Trace.trace) {
        Trace.info(
            "UDP.BundlingOutgoingPacketHandler.bundleAndSend()",
            "\nsending msgs:\n" + dumpMessages(msgs));
      }
      synchronized (msgs) {
        stopTimer();

        if (msgs.size() == 0) {
          return;
        }

        for (Iterator it = msgs.entrySet().iterator(); it.hasNext(); ) {
          entry = (Map.Entry) it.next();
          dest = (IpAddress) entry.getKey();
          addr = dest.getIpAddress();
          port = dest.getPort();
          l = (List) entry.getValue();
          try {
            out_stream.reset();
            // BufferedOutputStream bos=new BufferedOutputStream(out_stream);
            out_stream.write(Version.version_id, 0, Version.version_id.length); // write the version
            // bos.write(Version.version_id, 0, Version.version_id.length); // write the version
            out = new ObjectOutputStream(out_stream);
            // out=new ObjectOutputStream(bos);
            l.writeExternal(out);
            out.close(); // needed if out buffers its output to out_stream
            data = out_stream.toByteArray();
            doSend(data, addr, port);
          } catch (IOException e) {
            Trace.error(
                "UDP.BundlingOutgoingPacketHandle.bundleAndSend()",
                "exception sending msg (to dest=" + dest + "): " + e);
          }
        }
        msgs.clear();
      }
    }
Example #30
0
  @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);
  }