Dart pub
Support for running Dart applications, specifically Angel apps, across multiple servers.
The idea is that you have one master server running the load balancer, and the child applications call a session synchronizer.
Dedicated WebSocket support is also present.
See the examples.
This plug-in works on any Angel server, not just a LoadBalancer.
It caches responses, to lower future response times.
This package exposes a LoadBalancer class, which extends Angel,
and can be used like a normal server.
The default algorithm is a simple round-robin, but it can be extended for your own purposes.
Three load-balancing algorithms are included:
ROUND_ROBIN (default)LEAST_LATENCYSTICKY_SESSIONThe LoadBalancer also supports HTTPS and WebSockets. Bam.
You can also provide a maxConcurrentConnections to pool
server resources and prevent premature crashes.
This package also includes three SessionSynchronizer classes:
These are simply plugins that serialize and deserialize session data to external data stores. Try to call them as early as possible in your application, so that session data is loaded before any business logic.
import 'package:angel_framework/angel_framework.dart';
import 'package:angel_multiserver/angel_multiserver.dart';
import 'package:mongo_dart/mongo_dart.dart';
main() async {
var app = new Angel();
var db = new Db('<connection-string>');
await db.open();
await app.configure(
new MongoSessionSynchronizer(db.collection('sessions')));
}
The multiserver is also bundled with a MongoWebSocketSynchronizer.
Add this to your package's pubspec.yaml file:
dependencies:
angel_multiserver: "^1.0.9"
You can install packages from the command line:
with pub:
$ pub get
with Flutter:
$ flutter packages get
Alternatively, your editor might support pub get or packages get.
Check the docs for your editor to learn more.
Now in your Dart code, you can use:
import 'package:angel_multiserver/angel_multiserver.dart';
| Version | Uploaded | Documentation | Archive |
|---|---|---|---|
| 1.0.9 | Mar 28, 2017 |
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| 1.0.8 | Mar 7, 2017 |
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| 1.0.7 | Mar 6, 2017 |
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| 1.0.6 | Feb 28, 2017 |
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| 1.0.5 | Feb 27, 2017 |
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| 1.0.4 | Feb 26, 2017 |
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| 1.0.3 | Feb 26, 2017 |
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| 1.0.2 | Feb 26, 2017 |
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| 1.0.1 | Feb 26, 2017 |
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| 1.0.0 | Feb 24, 2017 |
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We analyzed this package on Apr 23, 2018, and provided a score, details, and suggestions below. Analysis was completed with status completed using:
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Popularity:
Describes how popular the package is relative to other packages.
[more]
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63 | / 100 |
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Health:
Code health derived from static analysis.
[more]
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52 | / 100 |
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Maintenance:
Reflects how tidy and up-to-date the package is.
[more]
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68 | / 100 |
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Overall score:
Weighted score of the above.
[more]
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61 |
Detected platforms: Flutter, other
Primary library:
package:angel_multiserver/angel_multiserver.dartwith components:io,isolate.
Maintain CHANGELOG.md.
Changelog entries help clients to follow the progress in your code.
Fix analysis and formatting issues.
Analysis or formatting checks reported 12 errors 22 hints.
Strong-mode analysis of
lib/src/cache.dartfailed with the following error:line: 29 col: 30
Undefined class 'AngelPlugin'.Strong-mode analysis of
lib/src/load_balancer.dartfailed with the following error:line: 52 col: 15
The named parameter 'debug' isn't defined.Similar analysis of the following files failed:
lib/src/session_synchronizer.dart(error)lib/src/algorithm.dart(hint)lib/src/synchronizers/memcached.dart(hint)lib/src/synchronizers/mongo.dart(hint)lib/src/synchronizers/redis.dart(hint)lib/src/synchronizers/synchronizers.dart(hint)
Maintain an example.
None of the files in your
example/directory matches a known example patterns. Common file name patterns include:main.dart,example.dartor you could also useangel_multiserver.dart.
| Package | Constraint | Resolved | Available |
|---|---|---|---|
| Direct dependencies | |||
| Dart SDK | >=1.19.0 | ||
| angel_framework | ^1.0.0-dev | 1.1.2 | |
| angel_websocket | ^1.0.0 | 1.1.1 | |
| glob | ^1.0.0 | 1.1.5 | |
| memcached_client | ^0.5.3 | 0.5.3 | |
| mongo_dart | ^0.2.10 | 0.2.10 | 0.3.1 |
| pool | ^1.3.0 | 1.3.4 | |
| random_string | ^0.0.1 | 0.0.1 | |
| redis_client | ^0.1.16 | 0.1.16 | |
| Transitive dependencies | |||
| angel_auth | 1.1.0+2 | ||
| angel_client | 1.2.0+1 | ||
| angel_http_exception | 1.0.0 | ||
| angel_model | 1.0.0 | ||
| angel_route | 2.0.5 | ||
| async | 2.0.6 | ||
| body_parser | 1.1.0 | ||
| bson | 0.2.0 | 0.3.0 | |
| charcode | 1.1.1 | ||
| collection | 1.14.9 | ||
| combinator | 1.0.0-beta+7 | ||
| container | 0.1.2 | ||
| convert | 2.0.1 | ||
| crypto | 2.0.2+1 | ||
| fixnum | 0.10.7 | ||
| http_parser | 3.1.1 | ||
| http_server | 0.9.7 | ||
| json_god | 2.0.0-beta+1 | ||
| logging | 0.11.3+1 | ||
| matcher | 0.12.2 | ||
| merge_map | 1.0.0 | ||
| meta | 1.1.2 | ||
| mime | 0.9.6 | ||
| mongo_dart_query | 0.2.2 | 0.3.0 | |
| more | 1.9.0 | ||
| path | 1.5.1 | ||
| quiver_hashcode | 1.0.0 | ||
| source_span | 1.4.0 | ||
| stack_trace | 1.9.2 | ||
| stream_channel | 1.6.5 | ||
| string_scanner | 1.0.2 | ||
| tuple | 1.0.1 | ||
| typed_data | 1.1.5 | ||
| uuid | 0.5.3 | 1.0.0 | |
| web_socket_channel | 1.0.7 | ||
| Dev dependencies | |||
| angel_compress | ^1.0.0 | ||
| angel_diagnostics | ^1.0.0-dev | ||
| angel_errors | ^1.0.0-dev | ||
| angel_static | ^1.1.0 | ||
| http | ^0.11.3 | 0.11.3+16 | |
| test | ^0.12.15 | ||