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https://issues.apache.org/jira/browse/DISPATCH-1532?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17001180#comment-17001180
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ASF GitHub Bot commented on DISPATCH-1532:
------------------------------------------
kgiusti commented on pull request #654: DISPATCH-1532 - Reimplemented
mobile-address-synchronization as a cor…
URL: https://github.com/apache/qpid-dispatch/pull/654#discussion_r360527815
##########
File path: src/router_core/modules/mobile_sync/mobile.c
##########
@@ -0,0 +1,860 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+#include "module.h"
+#include "router_core_private.h"
+#include "core_events.h"
+#include "route_control.h"
+#include <qpid/dispatch/ctools.h>
+#include <qpid/dispatch/log.h>
+#include <qpid/dispatch/compose.h>
+#include <qpid/dispatch/message.h>
+#include <stdio.h>
+#include <inttypes.h>
+
+#define PROTOCOL_VERSION 1
+static const char *OPCODE = "opcode";
+static const char *MAR = "MAR";
+static const char *MAU = "MAU";
+static const char *ID = "id";
+static const char *PV = "pv";
+static const char *AREA = "area";
+static const char *MOBILE_SEQ = "mobile_seq";
+static const char *HINTS = "hints";
+static const char *ADD = "add";
+static const char *DEL = "del";
+static const char *EXIST = "exist";
+static const char *HAVE_SEQ = "have_seq";
+
+//
+// Address.sync_mask bit values
+//
+#define ADDR_SYNC_DELETION_WAS_BLOCKED 0x00000001
+#define ADDR_SYNC_IN_ADD_LIST 0x00000002
+#define ADDR_SYNC_IN_DEL_LIST 0x00000004
+#define ADDR_SYNC_TO_BE_DELETED 0x00000008
+
+#define BIT_SET(M,B) M |= B
Review comment:
Any objection to moving these into ctools.h?
If so I'd recommend you put parenthesis around (B) in the assignments and
around both M and B in the check.
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> Reimplement mobile-sync as a core module
> ----------------------------------------
>
> Key: DISPATCH-1532
> URL: https://issues.apache.org/jira/browse/DISPATCH-1532
> Project: Qpid Dispatch
> Issue Type: Improvement
> Components: Routing Engine
> Reporter: Ted Ross
> Assignee: Ted Ross
> Priority: Major
> Fix For: 1.11.0
>
>
> The code in Qpid Dispatch Router currently does mobile address
> synchronization between routers in the Python router module. This has a
> couple of drawbacks in cases where there are large numbers of addresses:
> * The address strings are stored twice: once in the main address lookup
> hash table and again in the Python mobile address module.
> * Address lookup on the Python side is inefficient and has been a bottleneck
> (improved recently by a patch from Gordon Sim).
> * Python processing is single threaded. A large mobile address update can
> cause delays in processing management requests and link-state topology
> maintenance.
> The python router module was intended to be an on-the-side control-plane
> moduel that was not in the critical path for any performance-related
> activities. With large numbers of addresses in a network, synchronizing
> address locations becomes performance-related.
> To address these issues, mobile address synchronization can be moved into a
> core module where it can use and share the same address table that is used by
> the router core for make high speed routing decisions. In the process, it
> will leave the python modules alone to process management requests and
> topology maintenance uninterrupted.
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