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Posted to server-dev@james.apache.org by bt...@apache.org on 2019/01/11 09:58:17 UTC

[4/8] james-project git commit: JAMES-2630 Add Reactor utils

JAMES-2630 Add Reactor utils


Project: http://git-wip-us.apache.org/repos/asf/james-project/repo
Commit: http://git-wip-us.apache.org/repos/asf/james-project/commit/92842f40
Tree: http://git-wip-us.apache.org/repos/asf/james-project/tree/92842f40
Diff: http://git-wip-us.apache.org/repos/asf/james-project/diff/92842f40

Branch: refs/heads/master
Commit: 92842f40a6efba09fcbdb9f1295bd2cd719be6d7
Parents: 08c2f45
Author: Gautier DI FOLCO <gd...@linagora.com>
Authored: Tue Jan 8 09:46:52 2019 +0100
Committer: Benoit Tellier <bt...@linagora.com>
Committed: Fri Jan 11 16:57:08 2019 +0700

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 .../org/apache/james/util/ReactorUtils.java     | 27 ++++++++
 .../org/apache/james/util/ReactorUtilsTest.java | 72 ++++++++++++++++++++
 2 files changed, 99 insertions(+)
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http://git-wip-us.apache.org/repos/asf/james-project/blob/92842f40/server/container/util/src/main/java/org/apache/james/util/ReactorUtils.java
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diff --git a/server/container/util/src/main/java/org/apache/james/util/ReactorUtils.java b/server/container/util/src/main/java/org/apache/james/util/ReactorUtils.java
new file mode 100644
index 0000000..42e6d8e
--- /dev/null
+++ b/server/container/util/src/main/java/org/apache/james/util/ReactorUtils.java
@@ -0,0 +1,27 @@
+/****************************************************************
+ * 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.                                           *
+ ****************************************************************/
+package org.apache.james.util;
+
+import reactor.core.publisher.Mono;
+
+public class ReactorUtils {
+    public static <T> Mono<T> executeAndEmpty(Runnable runnable) {
+        return Mono.fromRunnable(runnable).then(Mono.empty());
+    }
+}

http://git-wip-us.apache.org/repos/asf/james-project/blob/92842f40/server/container/util/src/test/java/org/apache/james/util/ReactorUtilsTest.java
----------------------------------------------------------------------
diff --git a/server/container/util/src/test/java/org/apache/james/util/ReactorUtilsTest.java b/server/container/util/src/test/java/org/apache/james/util/ReactorUtilsTest.java
new file mode 100644
index 0000000..3c991e0
--- /dev/null
+++ b/server/container/util/src/test/java/org/apache/james/util/ReactorUtilsTest.java
@@ -0,0 +1,72 @@
+/****************************************************************
+ * 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.                                           *
+ ****************************************************************/
+package org.apache.james.util;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+import org.junit.jupiter.api.Nested;
+import org.junit.jupiter.api.Test;
+
+import reactor.core.publisher.Mono;
+
+class ReactorUtilsTest {
+
+    @Nested
+    class ExecuteAndEmpty {
+        @Test
+        void shouldExecuteTheRunnableAndReturnEmpty() {
+            Counter counter = new Counter(1);
+
+            Mono<?> reactor = Mono.empty()
+                    .switchIfEmpty(ReactorUtils.executeAndEmpty(() -> counter.increment(2)))
+                    .map(FunctionalUtils.toFunction(any -> counter.increment(4)));
+
+            assertThat(reactor.hasElement().block()).isFalse();
+            assertThat(counter.getCounter()).isEqualTo(3);
+        }
+
+        @Test
+        void shouldNotExecuteTheRunnableAndReturnTheValue() {
+            Counter counter = new Counter(1);
+
+            Mono<?> reactor = Mono.just(42)
+                    .switchIfEmpty(ReactorUtils.executeAndEmpty(() -> counter.increment(2)))
+                    .map(FunctionalUtils.toFunction(any -> counter.increment(4)));
+
+            assertThat(reactor.hasElement().block()).isTrue();
+            assertThat(counter.getCounter()).isEqualTo(5);
+        }
+
+        private class Counter {
+            private Integer counter;
+
+            public Counter(Integer counter) {
+                this.counter = counter;
+            }
+
+            public void increment(Integer other) {
+                counter += other;
+            }
+
+            public Integer getCounter() {
+                return counter;
+            }
+        }
+    }
+}
\ No newline at end of file


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