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| General Development |
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| Access Service Center |
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| Microservice invocation chain |
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| Customized-Tracing |
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| Local development and testing |
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| Http Filter |
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| File Uploading |
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| File Downloading |
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| Reactive Programing |
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| DNS Custom Configuration |
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| Proxy Settings |
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| Report framework version |
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| Cross-application invocation |
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| Customized serialization and deserialization |
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| </a> |
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| <li class="chapter " data-level="1.7.15" data-path="../general-development/context.html"> |
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| <a href="../general-development/context.html"> |
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| Using Context to pass control messages |
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| </a> |
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| <li class="chapter " data-level="1.7.16" data-path="../general-development/produceprocess.html"> |
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| <a href="../general-development/produceprocess.html"> |
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| Return value serialization extension |
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| </a> |
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| <li class="chapter " data-level="1.7.17" data-path="../general-development/CORS.html"> |
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| <a href="../general-development/CORS.html"> |
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| CORS mechanism |
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| <li class="chapter " data-level="1.7.18" data-path="../general-development/AlarmEvent.html"> |
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| <a href="../general-development/AlarmEvent.html"> |
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| Get fuse and instance isolation alarm event information |
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| </a> |
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| <li class="chapter " data-level="1.7.19" data-path="../general-development/shutdown.html"> |
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| Shutdown gracefully |
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| Handling exceptions |
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| <li class="chapter " data-level="1.7.21" data-path="../general-development/multienvironment.html"> |
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| <a href="../general-development/multienvironment.html"> |
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| Multi-environment isolation between microservice instances |
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| </a> |
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| <li class="chapter " data-level="1.7.22" data-path="../general-development/thread-model.html"> |
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| <a href="../general-development/thread-model.html"> |
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| Thread Model |
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| Configuration |
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| <a href="../config/general-config.html"> |
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| General config |
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| <a href=".." >HTTP2</a> |
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| <h1 id="http2">Http2</h1> |
| <h2 id="scenario">Scenario</h2> |
| <p>Users can easily enable Http2 protocol for better performance through configuration.</p> |
| <h2 id="external-service-communication-configuration">External Service Communication Configuration</h2> |
| <p>The configuration for external service communication is in the microservice.yaml file.</p> |
| <ul> |
| <li><p>Enable h2(Http2 + TLS)</p> |
| <p> Append <code>sslEnabled=true</code> to the listening address to enable TLS communication on server side. For details, see the section <a href="../../security/tls.md">Using TLS Communication</a>. Then add <code>protocol=http2</code> to enable h2 communication. Here is the sample configuration:</p> |
| <pre><code class="lang-yaml"><span class="hljs-attr">servicecomb:</span> |
| <span class="hljs-attr"> rest:</span> |
| <span class="hljs-attr"> address:</span> <span class="hljs-number">0.0</span><span class="hljs-number">.0</span><span class="hljs-number">.0</span>:<span class="hljs-number">8080</span>?sslEnabled=<span class="hljs-literal">true</span>&protocol=http2 |
| </code></pre> |
| </li> |
| <li><p>Enable h2c(Http2 without TLS)</p> |
| <p> Simply add <code>protocol=http2</code> to enable h2c communication in the server's configuration:</p> |
| <pre><code class="lang-yaml"><span class="hljs-attr">servicecomb:</span> |
| <span class="hljs-attr"> rest:</span> |
| <span class="hljs-attr"> address:</span> <span class="hljs-number">0.0</span><span class="hljs-number">.0</span><span class="hljs-number">.0</span>:<span class="hljs-number">8080</span>?protocol=http2 |
| </code></pre> |
| </li> |
| <li>The client will read the server's address configuration from service center, then communicate with the server by http2 protocol.</li> |
| </ul> |
| <p>Specific examples can refer to <a href="https://github.com/apache/servicecomb-java-chassis/blob/master/integration-tests/it-consumer/src/main/java/org/apache/servicecomb/it/ConsumerMain.java" target="_blank">http2-it-tests</a></p> |
| <h2 id="http2-server-configuration">http2 server configuration</h2> |
| <table> |
| <thead> |
| <tr> |
| <th>configuration</th> |
| <th>default</th> |
| <th>description</th> |
| <th>notice</th> |
| </tr> |
| </thead> |
| <tbody> |
| <tr> |
| <td>servicecomb.rest.server.http2.useAlpnEnabled</td> |
| <td>true</td> |
| <td>Whether to enable ALPN</td> |
| <td></td> |
| </tr> |
| <tr> |
| <td>servicecomb.rest.server.http2.concurrentStreams</td> |
| <td>100</td> |
| <td>The maximum stream concurrency supported in a connection</td> |
| <td>The smaller value of the concurrentStreams on the server side and the multiplexingLimit on the client side</td> |
| </tr> |
| </tbody> |
| </table> |
| <h2 id="http2-client-configuration">http2 client configuration</h2> |
| <table> |
| <thead> |
| <tr> |
| <th>configuration</th> |
| <th>default</th> |
| <th>description</th> |
| <th>notice</th> |
| </tr> |
| </thead> |
| <tbody> |
| <tr> |
| <td>servicecomb.rest.client.http2.useAlpnEnabled</td> |
| <td>true</td> |
| <td>Whether to enable ALPN</td> |
| <td></td> |
| </tr> |
| <tr> |
| <td>servicecomb.rest.client.http2.multiplexingLimit</td> |
| <td>-1</td> |
| <td>The maximum stream concurrency supported in a connection,-1 means no limit</td> |
| <td>The smaller value of the concurrentStreams on the server side and the multiplexingLimit on the client side</td> |
| </tr> |
| <tr> |
| <td>servicecomb.rest.client.http2.maxPoolSize</td> |
| <td>1</td> |
| <td>The maximum number of connections established for each IP:Port in each connection pool</td> |
| <td></td> |
| </tr> |
| <tr> |
| <td>servicecomb.rest.client.http2.idleTimeoutInSeconds</td> |
| <td>0</td> |
| <td>The timeout period of the idle connection, the connection will be closed after the timeout</td> |
| </tr> |
| </tbody> |
| </table> |
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