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[denonmarantz] Run the Telnet socket in a dedicated thread #9511

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Dec 26, 2020
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[denonmarantz] Run the Telnet socket in a dedicated thread #9511

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96d5110
Run the Telnet socket in a dedicated thread, not from the shared thre…
jwveldhuis Dec 24, 2020
fa4bbb5
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jwveldhuis Dec 26, 2020
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4 changes: 2 additions & 2 deletions ...ava/org/openhab/binding/denonmarantz/internal/connector/DenonMarantzConnectorFactory.java
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Original file line number Diff line number Diff line change
Expand Up @@ -29,9 +29,9 @@
public class DenonMarantzConnectorFactory {

public DenonMarantzConnector getConnector(DenonMarantzConfiguration config, DenonMarantzState state,
ScheduledExecutorService scheduler, HttpClient httpClient) {
ScheduledExecutorService scheduler, HttpClient httpClient, String thingUID) {
if (config.isTelnet()) {
return new DenonMarantzTelnetConnector(config, state, scheduler);
return new DenonMarantzTelnetConnector(config, state, scheduler, thingUID);
} else {
return new DenonMarantzHttpConnector(config, state, scheduler, httpClient);
}
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28 changes: 13 additions & 15 deletions ...ctor/telnet/DenonMarantzTelnetClient.java → ...elnet/DenonMarantzTelnetClientThread.java
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Original file line number Diff line number Diff line change
Expand Up @@ -31,9 +31,9 @@
* @author Jeroen Idserda - Initial contribution (1.x Binding)
* @author Jan-Willem Veldhuis - Refactored for 2.x
*/
public class DenonMarantzTelnetClient implements Runnable {
public class DenonMarantzTelnetClientThread extends Thread {

private Logger logger = LoggerFactory.getLogger(DenonMarantzTelnetClient.class);
private Logger logger = LoggerFactory.getLogger(DenonMarantzTelnetClientThread.class);

private static final Integer RECONNECT_DELAY = 60000; // 1 minute

Expand All @@ -43,8 +43,6 @@ public class DenonMarantzTelnetClient implements Runnable {

private DenonMarantzTelnetListener listener;

private boolean running = true;

private boolean connected = false;

private Socket socket;
Expand All @@ -53,15 +51,15 @@ public class DenonMarantzTelnetClient implements Runnable {

private BufferedReader in;

public DenonMarantzTelnetClient(DenonMarantzConfiguration config, DenonMarantzTelnetListener listener) {
public DenonMarantzTelnetClientThread(DenonMarantzConfiguration config, DenonMarantzTelnetListener listener) {
logger.debug("Denon listener created");
this.config = config;
this.listener = listener;
}

@Override
public void run() {
while (running) {
while (!isInterrupted()) {
if (!connected) {
connectTelnetSocket();
}
Expand Down Expand Up @@ -90,20 +88,21 @@ public void run() {
connected = false;
}
} catch (IOException e) {
if (!Thread.currentThread().isInterrupted()) {
if (!isInterrupted()) {
// only log if we don't stop this on purpose causing a SocketClosed
logger.debug("Error in telnet connection ", e);
}
connected = false;
listener.telnetClientConnected(false);
}
} while (running && connected);
} while (!isInterrupted() && connected);
}
disconnect();
logger.debug("Stopped client thread");
}

public void sendCommand(String command) {
if (out != null) {
logger.debug("Sending command {}", command);
try {
out.write(command + '\r');
out.flush();
Expand All @@ -116,21 +115,21 @@ public void sendCommand(String command) {
}

public void shutdown() {
this.running = false;
disconnect();
}

private void connectTelnetSocket() {
disconnect();
int delay = 0;

while (this.running && (socket == null || !socket.isConnected())) {
while (!isInterrupted() && (socket == null || !socket.isConnected())) {
try {
Thread.sleep(delay);
logger.debug("Connecting to {}", config.getHost());

// Use raw socket instead of TelnetClient here because TelnetClient sends an extra newline char
// after each write which causes the connection to become unresponsive.
// Use raw socket instead of TelnetClient here because TelnetClient sends an
// extra newline char after each write which causes the connection to become
// unresponsive.
socket = new Socket();
socket.connect(new InetSocketAddress(config.getHost(), config.getTelnetPort()), TIMEOUT);
socket.setKeepAlive(true);
Expand All @@ -141,6 +140,7 @@ private void connectTelnetSocket() {

connected = true;
listener.telnetClientConnected(true);
logger.debug("Denon telnet client connected to {}", config.getHost());
} catch (IOException e) {
logger.debug("Cannot connect to {}", config.getHost(), e);
listener.telnetClientConnected(false);
Expand All @@ -149,8 +149,6 @@ private void connectTelnetSocket() {
}
delay = RECONNECT_DELAY;
}

logger.debug("Denon telnet client connected to {}", config.getHost());
}

public boolean isConnected() {
Expand Down
23 changes: 14 additions & 9 deletions ...g/openhab/binding/denonmarantz/internal/connector/telnet/DenonMarantzTelnetConnector.java
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Original file line number Diff line number Diff line change
Expand Up @@ -46,30 +46,32 @@ public class DenonMarantzTelnetConnector extends DenonMarantzConnector implement

private static final BigDecimal NINETYNINE = new BigDecimal("99");

private DenonMarantzTelnetClient telnetClient;
private DenonMarantzTelnetClientThread telnetClientThread;

private boolean displayNowplaying = false;

protected boolean disposing = false;

private Future<?> telnetStateRequest;

private Future<?> telnetRunnable;
private String thingUID;

public DenonMarantzTelnetConnector(DenonMarantzConfiguration config, DenonMarantzState state,
ScheduledExecutorService scheduler) {
ScheduledExecutorService scheduler, String thingUID) {
this.config = config;
this.scheduler = scheduler;
this.state = state;
this.thingUID = thingUID;
}

/**
* Set up the connection to the receiver. Either using Telnet or by polling the HTTP API.
*/
@Override
public void connect() {
telnetClient = new DenonMarantzTelnetClient(config, this);
telnetRunnable = scheduler.submit(telnetClient);
telnetClientThread = new DenonMarantzTelnetClientThread(config, this);
telnetClientThread.setName("OH-binding-" + thingUID);
telnetClientThread.start();
}

@Override
Expand Down Expand Up @@ -98,9 +100,12 @@ public void dispose() {
telnetStateRequest = null;
}

if (telnetClient != null && !telnetRunnable.isDone()) {
telnetRunnable.cancel(true);
telnetClient.shutdown();
if (telnetClientThread != null) {
telnetClientThread.interrupt();
// Invoke a shutdown after interrupting the thread to close the socket immediately,
// otherwise the client keeps running until a line was received from the telnet connection
telnetClientThread.shutdown();
telnetClientThread = null;
}
}

Expand Down Expand Up @@ -262,7 +267,7 @@ protected void internalSendCommand(String command) {
logger.warn("Trying to send empty command");
return;
}
telnetClient.sendCommand(command);
telnetClientThread.sendCommand(command);
}

/**
Expand Down
3 changes: 2 additions & 1 deletion .../src/main/java/org/openhab/binding/denonmarantz/internal/handler/DenonMarantzHandler.java
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Original file line number Diff line number Diff line change
Expand Up @@ -314,7 +314,8 @@ private void createConnection() {
if (connector != null) {
connector.dispose();
}
connector = connectorFactory.getConnector(config, denonMarantzState, scheduler, httpClient);
connector = connectorFactory.getConnector(config, denonMarantzState, scheduler, httpClient,
this.getThing().getUID().getAsString());
connector.connect();
}

Expand Down