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org.freedesktop.dbus.messages.MethodCall Maven / Gradle / Ivy
Improved version of the DBus-Java library provided by freedesktop.org (https://dbus.freedesktop.org/doc/dbus-java/).
package org.freedesktop.dbus.messages;
import org.freedesktop.dbus.connections.impl.DBusConnection;
import org.freedesktop.dbus.exceptions.DBusException;
import org.freedesktop.dbus.exceptions.MessageFormatException;
import java.time.Duration;
import java.util.ArrayList;
import java.util.List;
public class MethodCall extends MethodBase {
private static long replyWaitTimeout = Duration.ofSeconds(20).toMillis();
// CHECKSTYLE:OFF
Message reply = null;
// CHECKSTYLE:ON
MethodCall() {
}
public MethodCall(String _dest, String _path, String _iface, String _member, byte _flags, String _sig, Object... _args) throws DBusException {
this(null, _dest, _path, _iface, _member, _flags, _sig, _args);
}
public MethodCall(String _source, String _dest, String _path, String _iface, String _member, byte _flags, String _sig, Object... _args) throws DBusException {
super(DBusConnection.getEndianness(), Message.MessageType.METHOD_CALL, _flags);
if (null == _member || null == _path) {
throw new MessageFormatException("Must specify destination, path and function name to MethodCalls.");
}
Object[] header = getHeader();
header[Message.HeaderField.PATH] = _path;
header[Message.HeaderField.MEMBER] = _member;
List hargs = new ArrayList<>();
hargs.add(createHeaderArgs(HeaderField.PATH, ArgumentType.OBJECT_PATH_STRING, _path));
if (null != _source) {
hargs.add(createHeaderArgs(HeaderField.SENDER, ArgumentType.STRING_STRING, _source));
}
if (null != _dest) {
hargs.add(createHeaderArgs(HeaderField.DESTINATION, ArgumentType.STRING_STRING, _dest));
}
if (null != _iface) {
hargs.add(createHeaderArgs(HeaderField.INTERFACE, ArgumentType.STRING_STRING, _iface));
}
hargs.add(createHeaderArgs(HeaderField.MEMBER, ArgumentType.STRING_STRING, _member));
if (null != _sig) {
logger.debug("Appending arguments with signature: {}", _sig);
hargs.add(createHeaderArgs(HeaderField.SIGNATURE, ArgumentType.SIGNATURE_STRING, _sig));
setArgs(_args);
}
appendFileDescriptors(hargs, _sig, _args);
padAndMarshall(hargs, getSerial(), _sig, _args);
}
/**
* Set the default timeout for method calls.
* Default is 20s.
* @param _timeout New timeout in ms.
*/
public static void setDefaultTimeout(long _timeout) {
replyWaitTimeout = _timeout;
}
public synchronized boolean hasReply() {
return null != reply;
}
/**
* Block (if neccessary) for a reply.
* @return The reply to this MethodCall, or null if a timeout happens.
* @param _timeout The length of time to block before timing out (ms).
*/
public synchronized Message getReply(long _timeout) {
logger.trace("Blocking on {}", this);
if (null != reply) {
return reply;
}
try {
wait(_timeout);
return reply;
} catch (InterruptedException _exI) {
Thread.currentThread().interrupt(); // keep interrupted state
return reply;
}
}
/**
* Block (if neccessary) for a reply.
* Default timeout is 20s, or can be configured with setDefaultTimeout()
* @return The reply to this MethodCall, or null if a timeout happens.
*/
public synchronized Message getReply() {
return getReply(replyWaitTimeout);
}
public synchronized void setReply(Message _reply) {
logger.trace("Setting reply to {} to {}", this, _reply);
this.reply = _reply;
notifyAll();
}
}
