Refactor client codes to use similar, standardized API

clients/java/Example.java

@@ -0,0 +1,13 @@
+public class Example {
+    public static void main(String[] args) {
+        try (PipeIO pipeio = new PipeIO("in", "out")) {
+            pipeio.reader.setMessageHandler(new MessageHandler(){
+                @Override
+                public void call(String msg) {
+                    pipeio.writer.sendMessage(msg);
+                }
+            });
+            pipeio.reader.run();
+        }
+    }
+}

clients/java/MessageHandler.java

@@ -0,0 +1,3 @@
+public interface MessageHandler {
+    public void call(String msg);
+}

clients/java/PipeIO.java

@@ -2,25 +2,16 @@ import java.io.IOException;
 
 
 public class PipeIO implements AutoCloseable {
-    protected PipeReader reader;
-    protected PipeWriter writer;
+    public PipeReader reader;
+    public PipeWriter writer;
 
-    public PipeIO(String in_pipe_path, String out_pipe_path) throws IOException {
+    public PipeIO(String in_pipe_path, String out_pipe_path) {
         this.reader = new PipeReader(in_pipe_path);
         this.writer = new PipeWriter(out_pipe_path);
     }
 
-    public void close() throws IOException {
+    public void close() {
         this.reader.close();
         this.writer.close();
     }
-
-    public void run() throws IOException {
-        String msg;
-        while ((msg = this.reader.recvMessage()) != null) {
-            this.handleMessage(msg);
-        }
-    }
-
-    public void handleMessage(String msg) throws IOException {}
 }

clients/java/PipeReader.java

@@ -1,21 +1,50 @@
 import java.io.BufferedReader;
 import java.io.FileReader;
 import java.io.IOException;
+import java.io.UncheckedIOException;
 import java.lang.AutoCloseable;
 
 
 public class PipeReader implements AutoCloseable {
     private BufferedReader pipe;
+    private MessageHandler messageHandler;
 
-    public PipeReader(String pipe_path) throws IOException {
-        this.pipe = new BufferedReader(new FileReader(pipe_path));
+    public PipeReader(String pipe_path) {
+        try {
+            this.pipe = new BufferedReader(new FileReader(pipe_path));
+        } catch (IOException e) {
+            throw new UncheckedIOException(e);
+        }
+        this.messageHandler = new MessageHandler(){
+            @Override
+            public void call(String msg) {}
+        };
     }
 
-    public void close() throws IOException {
-        this.pipe.close();
+    public void close() {
+        try {
+            this.pipe.close();
+        } catch (IOException e) {
+            throw new UncheckedIOException(e);
+        }
     }
 
-    public String recvMessage() throws IOException {
-        return this.pipe.readLine();
+    public void setMessageHandler(MessageHandler handler) {
+        this.messageHandler = handler;
+    }
+
+    public void run() {
+        String msg;
+        while ((msg = this.recvMessage()) != null) {
+            this.messageHandler.call(msg);
+        }
+    }
+
+    public String recvMessage() {
+        try {
+            return this.pipe.readLine();
+        } catch (IOException e) {
+            throw new UncheckedIOException(e);
+        }
     }
 }

clients/java/PipeWriter.java

@@ -1,22 +1,35 @@
 import java.io.BufferedWriter;
 import java.io.FileWriter;
 import java.io.IOException;
+import java.io.UncheckedIOException;
 import java.lang.AutoCloseable;
 
 
 public class PipeWriter implements AutoCloseable {
     private BufferedWriter pipe;
 
-    public PipeWriter(String pipe_path) throws IOException {
-        this.pipe = new BufferedWriter(new FileWriter(pipe_path));
+    public PipeWriter(String pipe_path) {
+        try {
+            this.pipe = new BufferedWriter(new FileWriter(pipe_path));
+        } catch(IOException e) {
+            throw new UncheckedIOException(e);
+        }
     }
 
-    public void close() throws IOException {
-        this.pipe.close();
+    public void close() {
+        try {
+            this.pipe.close();
+        } catch (IOException e) {
+            throw new UncheckedIOException(e);
+        }
     }
 
-    public void sendMessage(String msg) throws IOException {
-        this.pipe.write(msg + "\n");
-        this.pipe.flush();
+    public void sendMessage(String msg) {
+        try {
+            this.pipe.write(msg + "\n");
+            this.pipe.flush();
+        } catch (IOException e) {
+            throw new UncheckedIOException(e);
+        }
     }
 }

clients/java/Test.java

@@ -1,22 +0,0 @@
-import java.io.IOException;
-
-
-public class Test extends PipeIO {
-    public Test(String in_pipe_path, String out_pipe_path) throws IOException {
-        super(in_pipe_path, out_pipe_path);
-    }
-
-    @Override
-    public void handleMessage(String msg) throws IOException {
-        this.writer.sendMessage(msg);
-    }
-
-    public static void main(String[] args) {
-        try(Test test = new Test("in", "out")) {
-            test.run();
-        }
-        catch (IOException e) {
-            e.printStackTrace();
-        }
-    }
-}