Java Utililty Methods HTTP Port Find

List of utility methods to do HTTP Port Find

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Description

The list of methods to do HTTP Port Find are organized into topic(s).

Method

intfindFreePort(int startPort)
find Free Port 
int current = startPort;
boolean found = false;
while (!found) {
    final Socket socket = new Socket();
    try {
        socket.connect(new InetSocketAddress("127.0.0.1", current), 100);
        current++;
    } catch (Exception ignored) {
...
intfindFreePort(int startPort)
Finds the next free port, starting with the one passed. 
ServerSocket ss;
for (int i = startPort; i < 65536; i++) {
    try {
        ss = new ServerSocket(i);
    } catch (IOException e) {
        continue;
    ss.close();
...
intfindFreePortExcepting(int portToExclude)
Finds a free port on the machine, but allow the ability to specify a port number to not use, no matter what. 
ServerSocket socket1 = null;
ServerSocket socket2 = null;
try {
    socket1 = new ServerSocket(0);
    socket2 = new ServerSocket(0);
    if (socket1.getLocalPort() != portToExclude) {
        return socket1.getLocalPort();
    return socket2.getLocalPort();
} finally {
    if (socket1 != null) {
        socket1.close();
    if (socket2 != null) {
        socket2.close();
intfindFreePortForApi()
find Free Port For Api 
ServerSocket socket = null;
try {
    socket = new ServerSocket(0);
    return socket.getLocalPort();
} catch (IOException e) {
} finally {
    if (socket != null) {
        try {
...
intfindUnusedPort()
find Unused Port 
try (final ServerSocket serverSocket = new ServerSocket(0)) {
    return serverSocket.getLocalPort();
} catch (IOException e) {
    throw new RuntimeException("Cannot find available port", e);
intfindUnusedPort()
find Unused Port 
int port;
ServerSocket socket = new ServerSocket();
try {
    socket.bind(new InetSocketAddress(0));
    port = socket.getLocalPort();
} finally {
    socket.close();
return port;
intfindUnusedPort(int preferredPort)
Find and return an unused server socket port. 
try {
    ServerSocket ss = new ServerSocket(0);
    int port = ss.getLocalPort();
    ss.close();
    return port;
} catch (IOException ioe) {
return -1;
...
ListfindUnusedPorts(int numPorts)
Finds a number of unused TCP ports. 
Closer closer = Closer.create();
List<Integer> freePorts = Lists.newArrayListWithCapacity(numPorts);
try {
    for (int i = 0; i < numPorts; i++) {
        try {
            ServerSocket serverSocket = new ServerSocket(0);
            closer.register(serverSocket);
            freePorts.add(serverSocket.getLocalPort());
...
intfreePort()
free Port 
Random random = new Random();
int port;
do {
    port = random.nextInt(65535);
} while (isLocalPortUsing(port));
return port;
intfreePort()
free Port 
ServerSocket ss = new ServerSocket(0);
try {
    return ss.getLocalPort();
} finally {
    ss.close();