From 26732f2fdd4720deee653ab96cd453ed65dcaa87 Mon Sep 17 00:00:00 2001 From: Vlad Dumitrescu Date: Thu, 13 Nov 2014 10:28:08 +0100 Subject: [jinterface] cleanup code according to new style --- .../java_src/com/ericsson/otp/erlang/OtpNode.java | 923 ++++++++++----------- 1 file changed, 461 insertions(+), 462 deletions(-) (limited to 'lib/jinterface/java_src/com/ericsson/otp/erlang/OtpNode.java') diff --git a/lib/jinterface/java_src/com/ericsson/otp/erlang/OtpNode.java b/lib/jinterface/java_src/com/ericsson/otp/erlang/OtpNode.java index 68addb9f2c..d5edd135cf 100644 --- a/lib/jinterface/java_src/com/ericsson/otp/erlang/OtpNode.java +++ b/lib/jinterface/java_src/com/ericsson/otp/erlang/OtpNode.java @@ -1,19 +1,19 @@ -/* +/* * %CopyrightBegin% - * + * * Copyright Ericsson AB 2000-2012. All Rights Reserved. - * + * * The contents of this file are subject to the Erlang Public License, * Version 1.1, (the "License"); you may not use this file except in * compliance with the License. You should have received a copy of the * Erlang Public License along with this software. If not, it can be * retrieved online at http://www.erlang.org/. - * + * * Software distributed under the License is distributed on an "AS IS" * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See * the License for the specific language governing rights and limitations * under the License. - * + * * %CopyrightEnd% */ package com.ericsson.otp.erlang; @@ -36,21 +36,21 @@ import java.util.Iterator; * communication mechanism is automatic and hidden from the application * programmer. *

- * + * *

* Once an instance of this class has been created, obtain one or more mailboxes * in order to send or receive messages. The first message sent to a given node * will cause a connection to be set up to that node. Any messages received will * be delivered to the appropriate mailboxes. *

- * + * *

* To shut down the node, call {@link #close close()}. This will prevent the * node from accepting additional connections and it will cause all existing * connections to be closed. Any unread messages in existing mailboxes can still * be read, however no new messages will be delivered to the mailboxes. *

- * + * *

* Note that the use of this class requires that Epmd (Erlang Port Mapper * Daemon) is running on each cooperating host. This class does not start Epmd @@ -83,74 +83,74 @@ public class OtpNode extends OtpLocalNode { * directory. The home directory is obtained from the System property * "user.home". *

- * + * *

* If the file does not exist, an empty string is used. This method makes no * attempt to create the file. *

- * + * * @param node * the name of this node. - * + * * @exception IOException * if communication could not be initialized. - * + * */ public OtpNode(final String node) throws IOException { - this(node, defaultCookie, 0); + this(node, defaultCookie, 0); } /** * Create a node. - * + * * @param node * the name of this node. - * + * * @param cookie * the authorization cookie that will be used by this node when * it communicates with other nodes. - * + * * @exception IOException * if communication could not be initialized. - * + * */ public OtpNode(final String node, final String cookie) throws IOException { - this(node, cookie, 0); + this(node, cookie, 0); } /** * Create a node. - * + * * @param node * the name of this node. - * + * * @param cookie * the authorization cookie that will be used by this node when * it communicates with other nodes. - * + * * @param port * the port number you wish to use for incoming connections. * Specifying 0 lets the system choose an available port. - * + * * @exception IOException * if communication could not be initialized. - * + * */ public OtpNode(final String node, final String cookie, final int port) - throws IOException { - super(node, cookie); + throws IOException { + super(node, cookie); - init(port); + init(port); } private synchronized void init(final int aport) throws IOException { - if (!initDone) { - connections = new Hashtable(17, - (float) 0.95); - mboxes = new Mailboxes(); - acceptor = new Acceptor(aport); - initDone = true; - } + if (!initDone) { + connections = new Hashtable(17, + (float) 0.95); + mboxes = new Mailboxes(); + acceptor = new Acceptor(aport); + initDone = true; + } } /** @@ -158,24 +158,24 @@ public class OtpNode extends OtpLocalNode { * and close all existing connections. */ public synchronized void close() { - acceptor.quit(); - OtpCookedConnection conn; - final Collection coll = connections.values(); - final Iterator it = coll.iterator(); - - mboxes.clear(); - - while (it.hasNext()) { - conn = it.next(); - it.remove(); - conn.close(); - } - initDone = false; + acceptor.quit(); + OtpCookedConnection conn; + final Collection coll = connections.values(); + final Iterator it = coll.iterator(); + + mboxes.clear(); + + while (it.hasNext()) { + conn = it.next(); + it.remove(); + conn.close(); + } + initDone = false; } @Override protected void finalize() { - close(); + close(); } /** @@ -183,65 +183,65 @@ public class OtpNode extends OtpLocalNode { * receive messages with other, similar mailboxes and with Erlang processes. * Messages can be sent to this mailbox by using its associated * {@link OtpMbox#self() pid}. - * + * * @return a mailbox. */ public OtpMbox createMbox() { - return mboxes.create(); + return mboxes.create(); } /** * Close the specified mailbox with reason 'normal'. - * + * * @param mbox * the mailbox to close. - * + * *

* After this operation, the mailbox will no longer be able to * receive messages. Any delivered but as yet unretrieved * messages can still be retrieved however. *

- * + * *

* If there are links from the mailbox to other * {@link OtpErlangPid pids}, they will be broken when this * method is called and exit signals with reason 'normal' will be * sent. *

- * + * */ public void closeMbox(final OtpMbox mbox) { - closeMbox(mbox, new OtpErlangAtom("normal")); + closeMbox(mbox, new OtpErlangAtom("normal")); } /** * Close the specified mailbox with the given reason. - * + * * @param mbox * the mailbox to close. * @param reason * an Erlang term describing the reason for the termination. - * + * *

* After this operation, the mailbox will no longer be able to * receive messages. Any delivered but as yet unretrieved * messages can still be retrieved however. *

- * + * *

* If there are links from the mailbox to other * {@link OtpErlangPid pids}, they will be broken when this * method is called and exit signals with the given reason will * be sent. *

- * + * */ public void closeMbox(final OtpMbox mbox, final OtpErlangObject reason) { - if (mbox != null) { - mboxes.remove(mbox); - mbox.name = null; - mbox.breakLinks(reason); - } + if (mbox != null) { + mboxes.remove(mbox); + mbox.name = null; + mbox.breakLinks(reason); + } } /** @@ -249,16 +249,16 @@ public class OtpNode extends OtpLocalNode { * with other, similar mailboxes and with Erlang processes. Messages can be * sent to this mailbox by using its registered name or the associated * {@link OtpMbox#self() pid}. - * + * * @param name * a name to register for this mailbox. The name must be unique * within this OtpNode. - * + * * @return a mailbox, or null if the name was already in use. - * + * */ public OtpMbox createMbox(final String name) { - return mboxes.create(name); + return mboxes.create(name); } /** @@ -269,58 +269,58 @@ public class OtpNode extends OtpLocalNode { * name; if the mailbox already had a name, calling this method will * supercede that name. *

- * + * * @param name * the name to register for the mailbox. Specify null to * unregister the existing name from this mailbox. - * + * * @param mbox * the mailbox to associate with the name. - * + * * @return true if the name was available, or false otherwise. */ public boolean registerName(final String name, final OtpMbox mbox) { - return mboxes.register(name, mbox); + return mboxes.register(name, mbox); } /** * Get a list of all known registered names on this node. - * + * * @return an array of Strings, containins all known registered names on * this node. */ public String[] getNames() { - return mboxes.names(); + return mboxes.names(); } /** * Determine the {@link OtpErlangPid pid} corresponding to a registered name * on this node. - * + * * @return the {@link OtpErlangPid pid} corresponding to the registered * name, or null if the name is not known on this node. */ public OtpErlangPid whereis(final String name) { - final OtpMbox m = mboxes.get(name); - if (m != null) { - return m.self(); - } - return null; + final OtpMbox m = mboxes.get(name); + if (m != null) { + return m.self(); + } + return null; } /** * Register interest in certain system events. The {@link OtpNodeStatus * OtpNodeStatus} handler object contains callback methods, that will be * called when certain events occur. - * + * * @param ahandler * the callback object to register. To clear the handler, specify * null as the handler to use. - * + * */ public synchronized void registerStatusHandler(final OtpNodeStatus ahandler) { - this.handler = ahandler; + handler = ahandler; } /** @@ -329,7 +329,7 @@ public class OtpNode extends OtpLocalNode { * setting up a connection to the remote node (if possible). Only a single * outgoing message is sent; the timeout is how long to wait for a response. *

- * + * *

* Only a single attempt is made to connect to the remote node, so for * example it is not possible to specify an extremely long timeout and @@ -337,74 +337,73 @@ public class OtpNode extends OtpLocalNode { * wait for a remote node to be started, the following construction may be * useful: *

- * + * * 
      * // ping every 2 seconds until positive response
      * while (!me.ping(him, 2000))
      *     ;
      *
- * + * * @param anode * the name of the node to ping. - * + * * @param timeout * the time, in milliseconds, to wait for response before * returning false. - * + * * @return true if the node was alive and the correct ping response was * returned. false if the correct response was not returned on time. */ /* * internal info about the message formats... - * + * * the request: -> REG_SEND {6,#Pid,'',net_kernel} * {'$gen_call',{#Pid,#Ref},{is_auth,bingo@aule}} - * + * * the reply: <- SEND {2,'',#Pid} {#Ref,yes} */ public boolean ping(final String anode, final long timeout) { - if (anode.equals(this.node)) { - return true; - } else if (anode.indexOf('@', 0) < 0 - && anode.equals(this.node - .substring(0, this.node.indexOf('@', 0)))) { - return true; - } - - // other node - OtpMbox mbox = null; - try { - mbox = createMbox(); - mbox.send("net_kernel", anode, getPingTuple(mbox)); - final OtpErlangObject reply = mbox.receive(timeout); - - final OtpErlangTuple t = (OtpErlangTuple) reply; - final OtpErlangAtom a = (OtpErlangAtom) t.elementAt(1); - return "yes".equals(a.atomValue()); - } catch (final Exception e) { - } finally { - closeMbox(mbox); - } - return false; + if (anode.equals(node)) { + return true; + } else if (anode.indexOf('@', 0) < 0 + && anode.equals(node.substring(0, node.indexOf('@', 0)))) { + return true; + } + + // other node + OtpMbox mbox = null; + try { + mbox = createMbox(); + mbox.send("net_kernel", anode, getPingTuple(mbox)); + final OtpErlangObject reply = mbox.receive(timeout); + + final OtpErlangTuple t = (OtpErlangTuple) reply; + final OtpErlangAtom a = (OtpErlangAtom) t.elementAt(1); + return "yes".equals(a.atomValue()); + } catch (final Exception e) { + } finally { + closeMbox(mbox); + } + return false; } /* create the outgoing ping message */ private OtpErlangTuple getPingTuple(final OtpMbox mbox) { - final OtpErlangObject[] ping = new OtpErlangObject[3]; - final OtpErlangObject[] pid = new OtpErlangObject[2]; - final OtpErlangObject[] anode = new OtpErlangObject[2]; + final OtpErlangObject[] ping = new OtpErlangObject[3]; + final OtpErlangObject[] pid = new OtpErlangObject[2]; + final OtpErlangObject[] anode = new OtpErlangObject[2]; - pid[0] = mbox.self(); - pid[1] = createRef(); + pid[0] = mbox.self(); + pid[1] = createRef(); - anode[0] = new OtpErlangAtom("is_auth"); - anode[1] = new OtpErlangAtom(node()); + anode[0] = new OtpErlangAtom("is_auth"); + anode[1] = new OtpErlangAtom(node()); - ping[0] = new OtpErlangAtom("$gen_call"); - ping[1] = new OtpErlangTuple(pid); - ping[2] = new OtpErlangTuple(anode); + ping[0] = new OtpErlangAtom("$gen_call"); + ping[1] = new OtpErlangTuple(pid); + ping[2] = new OtpErlangTuple(anode); - return new OtpErlangTuple(ping); + return new OtpErlangTuple(ping); } /* @@ -412,27 +411,27 @@ public class OtpNode extends OtpLocalNode { * pings. */ private boolean netKernel(final OtpMsg m) { - OtpMbox mbox = null; - try { - final OtpErlangTuple t = (OtpErlangTuple) m.getMsg(); - final OtpErlangTuple req = (OtpErlangTuple) t.elementAt(1); // actual - // request - - final OtpErlangPid pid = (OtpErlangPid) req.elementAt(0); // originating - // pid - - final OtpErlangObject[] pong = new OtpErlangObject[2]; - pong[0] = req.elementAt(1); // his #Ref - pong[1] = new OtpErlangAtom("yes"); - - mbox = createMbox(); - mbox.send(pid, new OtpErlangTuple(pong)); - return true; - } catch (final Exception e) { - } finally { - closeMbox(mbox); - } - return false; + OtpMbox mbox = null; + try { + final OtpErlangTuple t = (OtpErlangTuple) m.getMsg(); + final OtpErlangTuple req = (OtpErlangTuple) t.elementAt(1); // actual + // request + + final OtpErlangPid pid = (OtpErlangPid) req.elementAt(0); // originating + // pid + + final OtpErlangObject[] pong = new OtpErlangObject[2]; + pong[0] = req.elementAt(1); // his #Ref + pong[1] = new OtpErlangAtom("yes"); + + mbox = createMbox(); + mbox.send(pid, new OtpErlangTuple(pong)); + return true; + } catch (final Exception e) { + } finally { + closeMbox(mbox); + } + return false; } /* @@ -440,31 +439,31 @@ public class OtpNode extends OtpLocalNode { * delivered successfully, or false otherwise. */ boolean deliver(final OtpMsg m) { - OtpMbox mbox = null; - - try { - final int t = m.type(); - - if (t == OtpMsg.regSendTag) { - final String name = m.getRecipientName(); - /* special case for netKernel requests */ - if (name.equals("net_kernel")) { - return netKernel(m); - } - mbox = mboxes.get(name); - } else { - mbox = mboxes.get(m.getRecipientPid()); - } - - if (mbox == null) { - return false; - } - mbox.deliver(m); - } catch (final Exception e) { - return false; - } - - return true; + OtpMbox mbox = null; + + try { + final int t = m.type(); + + if (t == OtpMsg.regSendTag) { + final String name = m.getRecipientName(); + /* special case for netKernel requests */ + if (name.equals("net_kernel")) { + return netKernel(m); + } + mbox = mboxes.get(name); + } else { + mbox = mboxes.get(m.getRecipientPid()); + } + + if (mbox == null) { + return false; + } + mbox.deliver(m); + } catch (final Exception e) { + return false; + } + + return true; } /* @@ -472,86 +471,86 @@ public class OtpNode extends OtpLocalNode { * specified by the application */ void deliverError(final OtpCookedConnection conn, final Exception e) { - removeConnection(conn); - remoteStatus(conn.name, false, e); + removeConnection(conn); + remoteStatus(conn.name, false, e); } /* * find or create a connection to the given node */ OtpCookedConnection getConnection(final String anode) { - OtpPeer peer = null; - OtpCookedConnection conn = null; - - synchronized (connections) { - // first just try looking up the name as-is - conn = connections.get(anode); - - if (conn == null) { - // in case node had no '@' add localhost info and try again - peer = new OtpPeer(anode); - conn = connections.get(peer.node()); - - if (conn == null) { - try { - conn = new OtpCookedConnection(this, peer); - conn.setFlags(connFlags); - addConnection(conn); - } catch (final Exception e) { - /* false = outgoing */ - connAttempt(peer.node(), false, e); - } - } - } - return conn; - } + OtpPeer peer = null; + OtpCookedConnection conn = null; + + synchronized (connections) { + // first just try looking up the name as-is + conn = connections.get(anode); + + if (conn == null) { + // in case node had no '@' add localhost info and try again + peer = new OtpPeer(anode); + conn = connections.get(peer.node()); + + if (conn == null) { + try { + conn = new OtpCookedConnection(this, peer); + conn.setFlags(connFlags); + addConnection(conn); + } catch (final Exception e) { + /* false = outgoing */ + connAttempt(peer.node(), false, e); + } + } + } + return conn; + } } void addConnection(final OtpCookedConnection conn) { - if (conn != null && conn.name != null) { - connections.put(conn.name, conn); - remoteStatus(conn.name, true, null); - } + if (conn != null && conn.name != null) { + connections.put(conn.name, conn); + remoteStatus(conn.name, true, null); + } } private void removeConnection(final OtpCookedConnection conn) { - if (conn != null && conn.name != null) { - connections.remove(conn.name); - } + if (conn != null && conn.name != null) { + connections.remove(conn.name); + } } /* use these wrappers to call handler functions */ - private synchronized void remoteStatus(final String anode, final boolean up, - final Object info) { - if (handler == null) { - return; - } - try { - handler.remoteStatus(anode, up, info); - } catch (final Exception e) { - } + private synchronized void remoteStatus(final String anode, + final boolean up, final Object info) { + if (handler == null) { + return; + } + try { + handler.remoteStatus(anode, up, info); + } catch (final Exception e) { + } } synchronized void localStatus(final String anode, final boolean up, - final Object info) { - if (handler == null) { - return; - } - try { - handler.localStatus(anode, up, info); - } catch (final Exception e) { - } + final Object info) { + if (handler == null) { + return; + } + try { + handler.localStatus(anode, up, info); + } catch (final Exception e) { + } } synchronized void connAttempt(final String anode, final boolean incoming, - final Object info) { - if (handler == null) { - return; - } - try { - handler.connAttempt(anode, incoming, info); - } catch (final Exception e) { - } + final Object info) { + if (handler == null) { + return; + } + try { + handler.connAttempt(anode, incoming, info); + } catch (final Exception e) { + } } /* @@ -559,248 +558,248 @@ public class OtpNode extends OtpLocalNode { * references */ public class Mailboxes { - // mbox pids here - private Hashtable> byPid = null; - // mbox names here - private Hashtable> byName = null; - - public Mailboxes() { - byPid = new Hashtable>(17, - (float) 0.95); - byName = new Hashtable>(17, - (float) 0.95); - } - - public OtpMbox create(final String name) { - OtpMbox m = null; - - synchronized (byName) { - if (get(name) != null) { - return null; - } - final OtpErlangPid pid = createPid(); - m = new OtpMbox(OtpNode.this, pid, name); - byPid.put(pid, new WeakReference(m)); - byName.put(name, new WeakReference(m)); - } - return m; - } - - public OtpMbox create() { - final OtpErlangPid pid = createPid(); - final OtpMbox m = new OtpMbox(OtpNode.this, pid); - byPid.put(pid, new WeakReference(m)); - return m; - } - - public void clear() { - byPid.clear(); - byName.clear(); - } - - public String[] names() { - String allnames[] = null; - - synchronized (byName) { - final int n = byName.size(); - final Enumeration keys = byName.keys(); - allnames = new String[n]; - - int i = 0; - while (keys.hasMoreElements()) { - allnames[i++] = keys.nextElement(); - } - } - return allnames; - } - - public boolean register(final String name, final OtpMbox mbox) { - if (name == null) { - if (mbox.name != null) { - byName.remove(mbox.name); - mbox.name = null; - } - } else { - synchronized (byName) { - if (get(name) != null) { - return false; - } - byName.put(name, new WeakReference(mbox)); - mbox.name = name; - } - } - return true; - } - - /* - * look up a mailbox based on its name. If the mailbox has gone out of - * scope we also remove the reference from the hashtable so we don't - * find it again. - */ - public OtpMbox get(final String name) { - final WeakReference wr = byName.get(name); - - if (wr != null) { - final OtpMbox m = wr.get(); - - if (m != null) { - return m; - } - byName.remove(name); - } - return null; - } - - /* - * look up a mailbox based on its pid. If the mailbox has gone out of - * scope we also remove the reference from the hashtable so we don't - * find it again. - */ - public OtpMbox get(final OtpErlangPid pid) { - final WeakReference wr = byPid.get(pid); - - if (wr != null) { - final OtpMbox m = wr.get(); - - if (m != null) { - return m; - } - byPid.remove(pid); - } - return null; - } - - public void remove(final OtpMbox mbox) { - byPid.remove(mbox.self); - if (mbox.name != null) { - byName.remove(mbox.name); - } - } + // mbox pids here + private Hashtable> byPid = null; + // mbox names here + private Hashtable> byName = null; + + public Mailboxes() { + byPid = new Hashtable>(17, + (float) 0.95); + byName = new Hashtable>(17, + (float) 0.95); + } + + public OtpMbox create(final String name) { + OtpMbox m = null; + + synchronized (byName) { + if (get(name) != null) { + return null; + } + final OtpErlangPid pid = createPid(); + m = new OtpMbox(OtpNode.this, pid, name); + byPid.put(pid, new WeakReference(m)); + byName.put(name, new WeakReference(m)); + } + return m; + } + + public OtpMbox create() { + final OtpErlangPid pid = createPid(); + final OtpMbox m = new OtpMbox(OtpNode.this, pid); + byPid.put(pid, new WeakReference(m)); + return m; + } + + public void clear() { + byPid.clear(); + byName.clear(); + } + + public String[] names() { + String allnames[] = null; + + synchronized (byName) { + final int n = byName.size(); + final Enumeration keys = byName.keys(); + allnames = new String[n]; + + int i = 0; + while (keys.hasMoreElements()) { + allnames[i++] = keys.nextElement(); + } + } + return allnames; + } + + public boolean register(final String name, final OtpMbox mbox) { + if (name == null) { + if (mbox.name != null) { + byName.remove(mbox.name); + mbox.name = null; + } + } else { + synchronized (byName) { + if (get(name) != null) { + return false; + } + byName.put(name, new WeakReference(mbox)); + mbox.name = name; + } + } + return true; + } + + /* + * look up a mailbox based on its name. If the mailbox has gone out of + * scope we also remove the reference from the hashtable so we don't + * find it again. + */ + public OtpMbox get(final String name) { + final WeakReference wr = byName.get(name); + + if (wr != null) { + final OtpMbox m = wr.get(); + + if (m != null) { + return m; + } + byName.remove(name); + } + return null; + } + + /* + * look up a mailbox based on its pid. If the mailbox has gone out of + * scope we also remove the reference from the hashtable so we don't + * find it again. + */ + public OtpMbox get(final OtpErlangPid pid) { + final WeakReference wr = byPid.get(pid); + + if (wr != null) { + final OtpMbox m = wr.get(); + + if (m != null) { + return m; + } + byPid.remove(pid); + } + return null; + } + + public void remove(final OtpMbox mbox) { + byPid.remove(mbox.self); + if (mbox.name != null) { + byName.remove(mbox.name); + } + } } /* * this thread simply listens for incoming connections */ public class Acceptor extends Thread { - private final ServerSocket sock; - private final int acceptorPort; - private volatile boolean done = false; - - Acceptor(final int port) throws IOException { - sock = new ServerSocket(port); - this.acceptorPort = sock.getLocalPort(); - OtpNode.this.port = this.acceptorPort; - - setDaemon(true); - setName("acceptor"); - publishPort(); - start(); - } - - private boolean publishPort() throws IOException { - if (getEpmd() != null) { - return false; // already published - } - OtpEpmd.publishPort(OtpNode.this); - return true; - } - - private void unPublishPort() { - // unregister with epmd - OtpEpmd.unPublishPort(OtpNode.this); - - // close the local descriptor (if we have one) - closeSock(epmd); - epmd = null; - } - - public void quit() { - unPublishPort(); - done = true; - closeSock(sock); - localStatus(node, false, null); - } - - private void closeSock(final ServerSocket s) { - try { - if (s != null) { - s.close(); - } - } catch (final Exception e) { - } - } - - private void closeSock(final Socket s) { - try { - if (s != null) { - s.close(); - } - } catch (final Exception e) { - } - } - - public int port() { - return acceptorPort; - } - - @Override - public void run() { - Socket newsock = null; - OtpCookedConnection conn = null; - - localStatus(node, true, null); - - accept_loop: while (!done) { - conn = null; - - try { - newsock = sock.accept(); - } catch (final Exception e) { - // Problem in java1.2.2: accept throws SocketException - // when socket is closed. This will happen when - // acceptor.quit() - // is called. acceptor.quit() will call localStatus(...), so - // we have to check if that's where we come from. - if (!done) { - localStatus(node, false, e); - } - break accept_loop; - } - - try { - synchronized (connections) { - conn = new OtpCookedConnection(OtpNode.this, newsock); - conn.setFlags(connFlags); - addConnection(conn); - } - } catch (final OtpAuthException e) { - if (conn != null && conn.name != null) { - connAttempt(conn.name, true, e); - } else { - connAttempt("unknown", true, e); - } - closeSock(newsock); - } catch (final IOException e) { - if (conn != null && conn.name != null) { - connAttempt(conn.name, true, e); - } else { - connAttempt("unknown", true, e); - } - closeSock(newsock); - } catch (final Exception e) { - closeSock(newsock); - closeSock(sock); - localStatus(node, false, e); - break accept_loop; - } - } // while - - // if we have exited loop we must do this too - unPublishPort(); - } + private final ServerSocket sock; + private final int acceptorPort; + private volatile boolean done = false; + + Acceptor(final int port) throws IOException { + sock = new ServerSocket(port); + acceptorPort = sock.getLocalPort(); + OtpNode.this.port = acceptorPort; + + setDaemon(true); + setName("acceptor"); + publishPort(); + start(); + } + + private boolean publishPort() throws IOException { + if (getEpmd() != null) { + return false; // already published + } + OtpEpmd.publishPort(OtpNode.this); + return true; + } + + private void unPublishPort() { + // unregister with epmd + OtpEpmd.unPublishPort(OtpNode.this); + + // close the local descriptor (if we have one) + closeSock(epmd); + epmd = null; + } + + public void quit() { + unPublishPort(); + done = true; + closeSock(sock); + localStatus(node, false, null); + } + + private void closeSock(final ServerSocket s) { + try { + if (s != null) { + s.close(); + } + } catch (final Exception e) { + } + } + + private void closeSock(final Socket s) { + try { + if (s != null) { + s.close(); + } + } catch (final Exception e) { + } + } + + public int port() { + return acceptorPort; + } + + @Override + public void run() { + Socket newsock = null; + OtpCookedConnection conn = null; + + localStatus(node, true, null); + + accept_loop: while (!done) { + conn = null; + + try { + newsock = sock.accept(); + } catch (final Exception e) { + // Problem in java1.2.2: accept throws SocketException + // when socket is closed. This will happen when + // acceptor.quit() + // is called. acceptor.quit() will call localStatus(...), so + // we have to check if that's where we come from. + if (!done) { + localStatus(node, false, e); + } + break accept_loop; + } + + try { + synchronized (connections) { + conn = new OtpCookedConnection(OtpNode.this, newsock); + conn.setFlags(connFlags); + addConnection(conn); + } + } catch (final OtpAuthException e) { + if (conn != null && conn.name != null) { + connAttempt(conn.name, true, e); + } else { + connAttempt("unknown", true, e); + } + closeSock(newsock); + } catch (final IOException e) { + if (conn != null && conn.name != null) { + connAttempt(conn.name, true, e); + } else { + connAttempt("unknown", true, e); + } + closeSock(newsock); + } catch (final Exception e) { + closeSock(newsock); + closeSock(sock); + localStatus(node, false, e); + break accept_loop; + } + } // while + + // if we have exited loop we must do this too + unPublishPort(); + } } public void setFlags(final int flags) { - this.connFlags = flags; + connFlags = flags; } } -- cgit v1.2.3