fix: add backpressure to GroupBy [WriteApi] (#358)

Author: bednar

.circleci/config.yml

@@ -225,6 +225,9 @@ workflows:
       - tests-java:
           name: jdk-8-nightly
           influxdb-image: "quay.io/influxdb/influxdb:nightly"
+      - tests-java:
+          name: client-backpressure
+          junit-tests: "-DclientBackpressure=true -Dit.test=com.influxdb.client.ITBackpressure -DfailIfNoTests=false -Dtest=ignore -DwildcardSuites=ignore"
       - tests-java:
           name: client-benchmark
           junit-tests: "-DclientBenchmark=true -Dit.test=com.influxdb.client.ITBenchmarkTest -DfailIfNoTests=false -Dtest=ignore -DwildcardSuites=ignore"
@@ -249,7 +252,8 @@ workflows:
               only:
                 - master
     jobs:
-      - tests-java
       - tests-java:
-          name: jdk-11-beta
-          maven-image: "cimg/openjdk:11.0"
+          name: jdk-8
+      - tests-java:
+          name: client-backpressure
+          junit-tests: "-DclientBackpressure=true -Dit.test=com.influxdb.client.ITBackpressure -DfailIfNoTests=false -Dtest=ignore -DwildcardSuites=ignore"

CHANGELOG.md

@@ -22,6 +22,9 @@
 1. [#367](https://github.com/influxdata/influxdb-client-java/pull/367): Add `GatewayTimeoutException` for HTTP status code 504
 1. [#371](https://github.com/influxdata/influxdb-client-java/pull/371): Add possibility to customize the `User-Agent` HTTP header
 
+### Bug Fixes
+1. [#358](https://github.com/influxdata/influxdb-client-java/pull/358): Missing backpressure for asynchronous non-blocking API
+
 ### CI
 1. [#369](https://github.com/influxdata/influxdb-client-java/pull/369): Add JDK 18 to CI pipeline
 

client-test/src/main/java/com/influxdb/test/AbstractMockServerTest.java

@@ -40,6 +40,7 @@ public abstract class AbstractMockServerTest extends AbstractTest {
 
     private static final int INTERNAL_SERVER_ERROR = 500;
     protected MockWebServer mockServer;
+    protected MockServerExtension mockServerExtension;
 
     /**
      * Start Mock server.
@@ -49,21 +50,16 @@ public abstract class AbstractMockServerTest extends AbstractTest {
     @Nonnull
     protected String startMockServer() {
 
-        mockServer = new MockWebServer();
-        try {
-            mockServer.start();
-        } catch (IOException e) {
-            throw new RuntimeException(e);
-        }
+        mockServerExtension = new MockServerExtension();
+        mockServerExtension.start();
+        mockServer = mockServerExtension.server;
 
-        return mockServer.url("/").url().toString();
+        return mockServerExtension.baseURL;
     }
 
     @AfterEach
     protected void after() throws IOException {
-        if (mockServer != null) {
-            mockServer.shutdown();
-        }
+        mockServerExtension.shutdown();
     }
 
     @Nonnull

client-test/src/main/java/com/influxdb/test/MockServerExtension.java

@@ -0,0 +1,50 @@
+/*
+ * The MIT License
+ *
+ * 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.
+ */
+package com.influxdb.test;
+
+import java.io.IOException;
+
+import okhttp3.mockwebserver.MockWebServer;
+
+public final class MockServerExtension {
+
+    public MockWebServer server;
+    public String baseURL;
+
+    public void start() {
+
+        server = new MockWebServer();
+        try {
+            server.start();
+        } catch (IOException e) {
+            throw new RuntimeException(e);
+        }
+
+        baseURL = server.url("/").url().toString();
+    }
+
+    public void shutdown() throws IOException {
+        if (server != null) {
+            server.shutdown();
+        }
+    }
+}