-
Notifications
You must be signed in to change notification settings - Fork 4
Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
Make central location for handling events from major modules like rin…
…g and membership
- Loading branch information
Showing
8 changed files
with
209 additions
and
158 deletions.
There are no files selected for viewing
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file was deleted.
Oops, something went wrong.
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,158 @@ | ||
| // Copyright (c) 2015 Uber Technologies, Inc. | ||
| // | ||
| // Permission is hereby granted, free of charge, to any person obtaining a copy | ||
| // of this software and associated documentation files (the "Software"), to deal | ||
| // in the Software without restriction, including without limitation the rights | ||
| // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | ||
| // copies of the Software, and to permit persons to whom the Software is | ||
| // furnished to do so, subject to the following conditions: | ||
| // | ||
| // The above copyright notice and this permission notice shall be included in | ||
| // all copies or substantial portions of the Software. | ||
| // | ||
| // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | ||
| // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | ||
| // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | ||
| // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | ||
| // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | ||
| // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN | ||
| // THE SOFTWARE. | ||
| 'use strict'; | ||
|
|
||
| var Member = require('./membership/member.js'); | ||
| var MembershipEvents = require('./membership/events.js'); | ||
|
|
||
| function createChecksumComputedHandler(ringpop) { | ||
| return function onMembershipChecksumComputed() { | ||
| ringpop.stat('increment', 'membership.checksum-computed'); | ||
| ringpop.emit('membershipChecksumComputed'); | ||
| }; | ||
| } | ||
|
|
||
| function createEventHandler(ringpop) { | ||
| return function onEvent(event) { | ||
| switch (event.name) { | ||
| case MembershipEvents.LocalMemberLeaveEvent.Name: | ||
| ringpop.gossip.stop(); | ||
| ringpop.suspicion.stopAll(); | ||
| break; | ||
| } | ||
| }; | ||
| } | ||
| function createSetHandler(ringpop) { | ||
| return function onMembershipSet(updates) { | ||
| var serversToAdd = []; | ||
|
|
||
| for (var i = 0; i < updates.length; i++) { | ||
| var update = updates[i]; | ||
|
|
||
| ringpop.stat('increment', 'membership-set.' + (update.status || 'unknown')); | ||
|
|
||
| if (update.status === Member.Status.alive) { | ||
| serversToAdd.push(update.address); | ||
| } else if (update.status === Member.Status.suspect) { | ||
| serversToAdd.push(update.address); | ||
| ringpop.suspicion.start(update); | ||
| } | ||
|
|
||
| ringpop.dissemination.recordChange(update); | ||
| } | ||
|
|
||
| // Must add/remove servers from ring in batch. There are | ||
| // efficiency gains when only having to compute the ring | ||
| // checksum once. | ||
| if (serversToAdd.length > 0) { | ||
| ringpop.ring.addRemoveServers(serversToAdd); | ||
| } | ||
| }; | ||
| } | ||
|
|
||
| function createUpdatedHandler(ringpop) { | ||
| return function onMembershipUpdated(updates) { | ||
| for (var i = 0; i < updates.length; i++) { | ||
| var update = updates[i]; | ||
| ringpop.stat('increment', 'membership-update.' + | ||
| (update.status || 'unknown')); | ||
| } | ||
|
|
||
| ringpop.membershipUpdateRollup.trackUpdates(updates); | ||
| ringpop.stat('gauge', 'num-members', ringpop.membership.members.length); | ||
| ringpop.stat('timing', 'updates', updates.length); | ||
| ringpop.emit('membershipChanged'); | ||
| ringpop.emit('changed'); // Deprecated | ||
| }; | ||
| } | ||
|
|
||
| function createUpdatedHandlerForGossip(ringpop) { | ||
| return function onUpdated(updates) { | ||
| for (var i = 0; i < updates.length; i++) { | ||
| var update = updates[i]; | ||
| switch (update.status) { | ||
| case Member.Status.alive: | ||
| case Member.Status.faulty: | ||
| case Member.Status.leave: | ||
| ringpop.suspicion.stop(update); | ||
| break; | ||
| case Member.Status.suspect: | ||
| ringpop.suspicion.start(update); | ||
| break; | ||
| } | ||
|
|
||
| ringpop.dissemination.recordChange(update); | ||
| } | ||
| }; | ||
| } | ||
|
|
||
| function createUpdatedHandlerForRing(ringpop) { | ||
| return function onUpdated(updates) { | ||
| var serversToAdd = [], serversToRemove = []; | ||
| for (var i = 0; i < updates.length; i++) { | ||
| var update = updates[i]; | ||
| switch (update.status) { | ||
| case Member.Status.alive: | ||
| serversToAdd.push(update.address); | ||
| break; | ||
| case Member.Status.faulty: | ||
| case Member.Status.leave: | ||
| serversToRemove.push(update.address); | ||
| break; | ||
| } | ||
| } | ||
|
|
||
| // Must add/remove servers from ring in batch. There are | ||
| // efficiency gains when only having to compute the ring | ||
| // checksum once. | ||
| if (serversToAdd.length > 0 || serversToRemove.length > 0) { | ||
| var ringChanged = ringpop.ring.addRemoveServers(serversToAdd, | ||
| serversToRemove); | ||
|
|
||
| if (ringChanged) { | ||
| ringpop.emit('ringChanged'); | ||
| } | ||
| } | ||
| }; | ||
| } | ||
|
|
||
| function register(ringpop) { | ||
| if (!ringpop.membership) { | ||
| return; | ||
| } | ||
|
|
||
| var membership = ringpop.membership; | ||
| membership.on('checksumComputed', createChecksumComputedHandler(ringpop)); | ||
| membership.on('event', createEventHandler(ringpop)); | ||
| membership.on('set', createSetHandler(ringpop)); | ||
| membership.on('updated', createUpdatedHandler(ringpop)); | ||
| membership.on('updated', createUpdatedHandlerForGossip(ringpop)); | ||
| membership.on('updated', createUpdatedHandlerForRing(ringpop)); | ||
| } | ||
|
|
||
| module.exports = { | ||
| createChecksumComputedHandler: createChecksumComputedHandler, | ||
| createEventHandler: createEventHandler, | ||
| createSetHandler: createSetHandler, | ||
| createUpdatedHandler: createUpdatedHandler, | ||
| createUpdatedHandlerForGossip: createUpdatedHandlerForGossip, | ||
| createUpdatedHandlerForRing: createUpdatedHandlerForRing, | ||
| register: register | ||
| }; |
Oops, something went wrong.