Merge pull request #1745 from benjchristensen/serialized-subject

SerializedSubject

Author: benjchristensen

src/main/java/rx/subjects/SerializedSubject.java

@@ -0,0 +1,51 @@
+/**
+ * Copyright 2014 Netflix, Inc.
+ * 
+ * Licensed 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 rx.subjects;
+
+import rx.Subscriber;
+import rx.observers.SerializedObserver;
+
+public class SerializedSubject<T, R> extends Subject<T, R> {
+    private final SerializedObserver<T> observer;
+
+    public SerializedSubject(final Subject<T, R> actual) {
+        super(new OnSubscribe<R>() {
+
+            @Override
+            public void call(Subscriber<? super R> child) {
+                actual.unsafeSubscribe(child);
+            }
+
+        });
+        this.observer = new SerializedObserver<T>(actual);
+    }
+
+    @Override
+    public void onCompleted() {
+        observer.onCompleted();
+    }
+
+    @Override
+    public void onError(Throwable e) {
+        observer.onError(e);
+    }
+
+    @Override
+    public void onNext(T t) {
+        observer.onNext(t);
+    }
+
+}

src/test/java/rx/subjects/SerializedSubjectTest.java

@@ -0,0 +1,36 @@
+/**
+ * Copyright 2014 Netflix, Inc.
+ * 
+ * Licensed 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 rx.subjects;
+
+import java.util.Arrays;
+
+import org.junit.Test;
+
+import rx.observers.TestSubscriber;
+
+public class SerializedSubjectTest {
+
+    @Test
+    public void testBasic() {
+        SerializedSubject<String, String> subject = new SerializedSubject<String, String>(PublishSubject.<String> create());
+        TestSubscriber<String> ts = new TestSubscriber<String>();
+        subject.subscribe(ts);
+        subject.onNext("hello");
+        subject.onCompleted();
+        ts.awaitTerminalEvent();
+        ts.assertReceivedOnNext(Arrays.asList("hello"));
+    }
+}