ActorContext.getParent for Java API #22413

akka-docs/rst/java/code/jdocs/stream/io/StreamFileDocTest.java

@@ -0,0 +1,90 @@
+/**
+ * Copyright (C) 2015-2017 Lightbend Inc. <http://www.lightbend.com>
+ */
+package jdocs.stream.io;
+
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+import java.io.IOException;
+import java.util.concurrent.CompletionStage;
+
+import akka.Done;
+import akka.actor.ActorSystem;
+import akka.stream.ActorAttributes;
+import akka.stream.javadsl.Sink;
+import akka.stream.javadsl.FileIO;
+import jdocs.AbstractJavaTest;
+import jdocs.stream.SilenceSystemOut;
+import org.junit.AfterClass;
+import org.junit.BeforeClass;
+import org.junit.Test;
+
+import akka.stream.*;
+import akka.testkit.JavaTestKit;
+import akka.util.ByteString;
+
+public class StreamFileDocTest extends AbstractJavaTest {
+
+  static ActorSystem system;
+
+  static Materializer mat;
+
+  @BeforeClass
+  public static void setup() {
+    system = ActorSystem.create("StreamFileDocTest");
+    mat = ActorMaterializer.create(system);
+  }
+
+  @AfterClass
+  public static void tearDown() {
+    JavaTestKit.shutdownActorSystem(system);
+    system = null;
+    mat = null;
+  }
+
+
+  final SilenceSystemOut.System System = SilenceSystemOut.get();
+
+  {
+    //#file-source
+    final Path file = Paths.get("example.csv");
+    //#file-source
+  }
+
+  @Test
+  public void demonstrateMaterializingBytesWritten() throws IOException {
+    final Path file = Files.createTempFile(getClass().getName(), ".tmp");
+
+    try {
+      //#file-source
+      Sink<ByteString, CompletionStage<Done>> printlnSink =
+        Sink.<ByteString> foreach(chunk -> System.out.println(chunk.utf8String()));
+
+      CompletionStage<IOResult> ioResult =
+        FileIO.fromPath(file)
+          .to(printlnSink)
+          .run(mat);
+      //#file-source
+    } finally {
+      Files.delete(file);
+    }
+  }
+
+  @Test
+  public void demonstrateSettingDispatchersInCode() throws IOException {
+    final Path file = Files.createTempFile(getClass().getName(), ".tmp");
+
+    try {
+      Sink<ByteString, CompletionStage<IOResult>> fileSink =
+      //#custom-dispatcher-code
+      FileIO.toPath(file)
+        .withAttributes(ActorAttributes.dispatcher("custom-blocking-io-dispatcher"));
+      //#custom-dispatcher-code
+    } finally {
+      Files.delete(file);
+    }
+  }
+
+
+}