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Posted to commits@qpid.apache.org by rh...@apache.org on 2014/11/28 14:50:25 UTC
[47/51] [abbrv] qpid-proton git commit: Improve error handling a bit,
still something of a work in progress
Improve error handling a bit, still something of a work in progress
git-svn-id: https://svn.apache.org/repos/asf/qpid/proton/branches/fadams-javascript-binding@1628232 13f79535-47bb-0310-9956-ffa450edef68
Project: http://git-wip-us.apache.org/repos/asf/qpid-proton/repo
Commit: http://git-wip-us.apache.org/repos/asf/qpid-proton/commit/0d44f572
Tree: http://git-wip-us.apache.org/repos/asf/qpid-proton/tree/0d44f572
Diff: http://git-wip-us.apache.org/repos/asf/qpid-proton/diff/0d44f572
Branch: refs/heads/master
Commit: 0d44f57218ac58e4f1cf503e92fe60abc3e16920
Parents: 92b8098
Author: fadams <fa...@unknown>
Authored: Mon Sep 29 17:40:38 2014 +0000
Committer: fadams <fa...@unknown>
Committed: Mon Sep 29 17:40:38 2014 +0000
----------------------------------------------------------------------
examples/messenger/javascript/send.html | 19 ++++---
proton-c/bindings/javascript/messenger.js | 70 +++++++-------------------
proton-c/bindings/javascript/module.js | 55 ++++++++++++++++++--
proton-c/include/proton/io.h | 46 +++++++++++++++++
proton-c/src/windows/iocp.c | 11 +++-
proton-c/src/windows/schannel.c | 13 +++--
tests/python/proton_tests/common.py | 2 +-
tests/python/proton_tests/messenger.py | 5 ++
8 files changed, 149 insertions(+), 72 deletions(-)
----------------------------------------------------------------------
http://git-wip-us.apache.org/repos/asf/qpid-proton/blob/0d44f572/examples/messenger/javascript/send.html
----------------------------------------------------------------------
diff --git a/examples/messenger/javascript/send.html b/examples/messenger/javascript/send.html
index f9aae90..f38a78e 100644
--- a/examples/messenger/javascript/send.html
+++ b/examples/messenger/javascript/send.html
@@ -65,17 +65,20 @@ console.log("body = " + body);
messenger.put(message);
};
-messenger.on('error', function(error) {
+var errorHandler = function(error) {
console.log("Received error " + error);
-// Error recovery seems to require a new Messenger instance.
-messenger.stop();
-messenger.free();
-messenger = new proton.Messenger();
-messenger.start();
-console.log("Restarted");
-});
+ // Error recovery seems to require a new Messenger instance.
+ messenger.stop();
+ messenger.free();
+ messenger = new proton.Messenger();
+
+ messenger.on('error', errorHandler);
+ messenger.start();
+ console.log("Restarted");
+};
+messenger.on('error', errorHandler);
messenger.start();
</script>
http://git-wip-us.apache.org/repos/asf/qpid-proton/blob/0d44f572/proton-c/bindings/javascript/messenger.js
----------------------------------------------------------------------
diff --git a/proton-c/bindings/javascript/messenger.js b/proton-c/bindings/javascript/messenger.js
index 69267ff..80eec5b 100644
--- a/proton-c/bindings/javascript/messenger.js
+++ b/proton-c/bindings/javascript/messenger.js
@@ -127,34 +127,6 @@ Module['Messenger'] = function(name) { // Messenger Constructor.
// This call ensures that the emscripten network callback functions are initialised.
Module.EventDispatch.registerMessenger(this);
-
-
- // TODO improve error handling mechanism.
- /*
- * The emscripten websocket error event could get triggered by any Messenger
- * and it's hard to determine which one without knowing which file descriptors
- * are associated with which instance. As a workaround we set the _checkErrors
- * flag when we call put or subscribe and reset it when work succeeds.
- */
- this._checkErrors = false;
-
- /**
- * TODO update to handle multiple Messenger instances
- * Handle the emscripten websocket error and use it to trigger a MessengerError
- * Note that the emscripten websocket error passes an array containing the
- * file descriptor, the errno and the message, we just use the message here.
- */
- var that = this;
- Module['websocket']['on']('error', function(error) {
-
-console.log("Module['websocket']['on'] caller is " + arguments.callee.caller.toString());
-
-console.log("that._checkErrors = " + that._checkErrors);
-console.log("error = " + error);
- if (that._checkErrors) {
- that._emit('error', new Module['MessengerError'](error[2]));
- }
- });
};
Module['Messenger'].PN_CUMULATIVE = 0x1; // Protected Class attribute.
@@ -176,22 +148,21 @@ var _Messenger_ = Module['Messenger'].prototype;
* @param {number} code the error code to check.
*/
_Messenger_._check = function(code) {
- if (code < 0) {
- if (code === Module['Error']['INPROGRESS']) {
- return code;
- }
-
+ if (code < 0 && code !== Module['Error']['INPROGRESS']) {
var errno = this['getErrno']();
var message = errno ? this['getError']() : Pointer_stringify(_pn_code(code));
-
- if (this._callbacks['error']) {
- this._emit('error', new Module['MessengerError'](message));
- } else {
- throw new Module['MessengerError'](message);
+ if (message !== 'PN_TIMEOUT') {
+ if (this._callbacks['error']) {
+console.log("emitting " + message);
+ this._emit('error', new Module['MessengerError'](message));
+ } else {
+console.log("throwing " + message);
+ throw new Module['MessengerError'](message);
+ }
}
- } else {
- return code;
}
+
+ return code;
};
/**
@@ -486,9 +457,10 @@ _Messenger_['subscribe'] = function(source) {
this._check(Module['Error']['ARG_ERR']);
}
var sp = Runtime.stackSave();
- this._checkErrors = true; // TODO improve error handling mechanism.
+ Module.EventDispatch.setCurrentMessenger(this);
var subscription = _pn_messenger_subscribe(this._messenger,
allocate(intArrayFromString(source), 'i8', ALLOC_STACK));
+ Module.EventDispatch.setCurrentMessenger(null);
Runtime.stackRestore(sp);
if (!subscription) {
@@ -532,12 +504,13 @@ _Messenger_['subscribe'] = function(source) {
_Messenger_['put'] = function(message, flush) {
flush = flush === false ? false : true; // Defaults to true if not explicitly specified.
message._preEncode();
- this._checkErrors = true; // TODO improve error handling mechanism.
+ Module.EventDispatch.setCurrentMessenger(this);
this._check(_pn_messenger_put(this._messenger, message._message));
+ Module.EventDispatch.setCurrentMessenger(null);
// If flush is set invoke pn_messenger_work.
if (flush) {
- _pn_messenger_work(this._messenger, 0);
+ this._check(_pn_messenger_work(this._messenger, 0));
}
// Getting the tracker is a little tricky as it is a 64 bit number. The way
@@ -617,16 +590,7 @@ _Messenger_['settle'] = function(tracker) {
* @returns {boolean} true if there is work still to do, false otherwise.
*/
_Messenger_['work'] = function() {
- var err = _pn_messenger_work(this._messenger, 0);
- if (err === Module['Error']['TIMEOUT']) {
-console.log("work = false");
- return false;
- } else {
- this._checkErrors = false; // TODO improve error handling mechanism.
- this._check(err);
-console.log("work = true");
- return true;
- }
+ return (this._check(_pn_messenger_work(this._messenger, 0)) > 0);
};
/**
http://git-wip-us.apache.org/repos/asf/qpid-proton/blob/0d44f572/proton-c/bindings/javascript/module.js
----------------------------------------------------------------------
diff --git a/proton-c/bindings/javascript/module.js b/proton-c/bindings/javascript/module.js
index e0e8373..aefceca 100644
--- a/proton-c/bindings/javascript/module.js
+++ b/proton-c/bindings/javascript/module.js
@@ -119,8 +119,17 @@ if (typeof process === 'object' && typeof require === 'function') {
*/
Module.EventDispatch = new function() { // Note the use of new to create a Singleton.
var _firstCall = true; // Flag used to check the first time registerMessenger is called.
+ /**
+ * We employ a cheat/hack to map file descriptors to the Messenger instance
+ * that owns them. In put/subscribe we set the current Messenger and then we
+ * intercept the library socket call with our own, which makes a call to
+ * the real library socket but also maps the file descriptor to _currentMessenger.
+ */
+ var _currentMessenger = null;
var _messengers = {};
+ var _fd2Messenger = {};
+
/**
* Provides functionality roughly equivalent to the following C code:
* while (1) {
@@ -135,21 +144,30 @@ Module.EventDispatch = new function() { // Note the use of new to create a Singl
* we bypass the _pn_messenger_work test as it will never succeed after closing.
*/
var _pump = function(fd, closing) {
+//console.log("\t_pump entry " + fd + ", " + closing);
for (var i in _messengers) {
if (_messengers.hasOwnProperty(i)) {
var messenger = _messengers[i];
+ //var messenger = _fd2Messenger[fd];
if (closing) {
+//console.log("_pump closing");
messenger._emit('work');
} else {
- while (_pn_messenger_work(messenger._messenger, 0) >= 0) {
+//console.log("_pump while start");
+ while (_pn_messenger_work(messenger._messenger, 0) > 0) {
+ //while (messenger['work']()) {
+ //while (messenger._check(_pn_messenger_work(messenger._messenger, 0)) > 0) {
+//console.log("A");
messenger._checkSubscriptions();
- messenger._checkErrors = false; // TODO improve error handling mechanism.
messenger._emit('work');
+//console.log("B");
}
+//console.log("_pump while finish");
}
}
}
+//console.log("\t_pump exit");
};
/**
@@ -157,9 +175,39 @@ Module.EventDispatch = new function() { // Note the use of new to create a Singl
* passing a flag to indicate that the socket is closing.
*/
var _close = function(fd) {
+//console.log("calling close fd = " + fd);
_pump(fd, true);
+ delete _fd2Messenger[fd];
};
+ var _error = function(error) {
+ var fd = error[0];
+ var messenger = _fd2Messenger[fd];
+ messenger._emit('error', new Module['MessengerError'](error[2]));
+ delete _fd2Messenger[fd];
+ };
+
+ /**
+ * This code cheekily replaces the library socket call with our own one.
+ * The real socket call returns a file descriptor so we harvest that and use
+ * that as a key to map file descriptors to their owning Messenger.
+ */
+ var realsocket = _socket;
+ _socket = function(domain, type, protocol) {
+ var fd = realsocket(domain, type, protocol);
+//console.log("calling socket fd = " + fd);
+ if (_currentMessenger) {
+ _fd2Messenger[fd] = _currentMessenger;
+ } else {
+ console.error("Error: file descriptor " + fd + " cannot be mapped to a Messenger.");
+ }
+ return fd;
+ }
+
+ this.setCurrentMessenger = function(messenger) {
+ _currentMessenger = messenger;
+ }
+
/**
* Register the specified Messenger as being interested in network events.
*/
@@ -175,11 +223,12 @@ Module.EventDispatch = new function() { // Note the use of new to create a Singl
Module['websocket']['on']('connection', _pump);
Module['websocket']['on']('message', _pump);
Module['websocket']['on']('close', _close);
+ Module['websocket']['on']('error', _error);
_firstCall = false;
}
var name = messenger.getName();
- _messengers[name] = messenger;
+ _messengers[name] = messenger;
};
/**
http://git-wip-us.apache.org/repos/asf/qpid-proton/blob/0d44f572/proton-c/include/proton/io.h
----------------------------------------------------------------------
diff --git a/proton-c/include/proton/io.h b/proton-c/include/proton/io.h
index 2d56736..36ffe23 100644
--- a/proton-c/include/proton/io.h
+++ b/proton-c/include/proton/io.h
@@ -31,6 +31,22 @@
extern "C" {
#endif
+/**
+ * A ::pn_socket_t provides an abstract handle to an IO stream. The
+ * pipe version is uni-directional. The network socket version is
+ * bi-directional. Both are non-blocking.
+ *
+ * pn_socket_t handles from ::pn_pipe() may only be used with
+ * ::pn_read(), ::pn_write(), ::pn_close() and pn_selector_select().
+ *
+ * pn_socket_t handles from ::pn_listen(), ::pn_accept() and
+ * ::pn_connect() must perform further IO using Proton functions.
+ * Mixing Proton io.h functions with native IO functions on the same
+ * handles will result in undefined behavior.
+ *
+ * pn_socket_t handles may only be used with a single pn_io_t during
+ * their lifetime.
+ */
#if defined(_WIN32) && ! defined(__CYGWIN__)
#ifdef _WIN64
typedef unsigned __int64 pn_socket_t;
@@ -43,7 +59,37 @@ typedef int pn_socket_t;
#define PN_INVALID_SOCKET (-1)
#endif
+/**
+ * A ::pn_io_t manages IO for a group of pn_socket_t handles. A
+ * pn_io_t object may have zero or one pn_selector_t selectors
+ * associated with it (see ::pn_io_selector()). If one is associated,
+ * all the pn_socket_t handles managed by a pn_io_t must use that
+ * pn_selector_t instance.
+ *
+ * The pn_io_t interface is single-threaded. All methods are intended
+ * to be used by one thread at a time, except that multiple threads
+ * may use:
+ *
+ * ::pn_write()
+ * ::pn_send()
+ * ::pn_recv()
+ * ::pn_close()
+ * ::pn_selector_select()
+ *
+ * provided at most one thread is calling ::pn_selector_select() and
+ * the other threads are operating on separate pn_socket_t handles.
+ */
typedef struct pn_io_t pn_io_t;
+
+/**
+ * A ::pn_selector_t provides a selection mechanism that allows
+ * efficient monitoring of a large number of Proton connections and
+ * listeners.
+ *
+ * External (non-Proton) sockets may also be monitored, either solely
+ * for event notification (read, write, and timer) or event
+ * notification and use with pn_io_t interfaces.
+ */
typedef struct pn_selector_t pn_selector_t;
PN_EXTERN pn_io_t *pn_io(void);
http://git-wip-us.apache.org/repos/asf/qpid-proton/blob/0d44f572/proton-c/src/windows/iocp.c
----------------------------------------------------------------------
diff --git a/proton-c/src/windows/iocp.c b/proton-c/src/windows/iocp.c
index 3c0451a..7b03b42 100644
--- a/proton-c/src/windows/iocp.c
+++ b/proton-c/src/windows/iocp.c
@@ -964,8 +964,15 @@ static void drain_zombie_completions(iocp_t *iocp)
}
}
+ unsigned shutdown_grace = 2000;
+ char *override = getenv("PN_SHUTDOWN_GRACE");
+ if (override) {
+ int grace = atoi(override);
+ if (grace > 0 && grace < 60000)
+ shutdown_grace = (unsigned) grace;
+ }
pn_timestamp_t now = pn_i_now();
- pn_timestamp_t deadline = now + 2000;
+ pn_timestamp_t deadline = now + shutdown_grace;
while (pn_list_size(iocp->zombie_list)) {
if (now >= deadline)
@@ -977,7 +984,7 @@ static void drain_zombie_completions(iocp_t *iocp)
}
now = pn_i_now();
}
- if (now >= deadline && pn_list_size(iocp->zombie_list))
+ if (now >= deadline && pn_list_size(iocp->zombie_list) && iocp->iocp_trace)
// Should only happen if really slow TCP handshakes, i.e. total network failure
iocp_log("network failure on Proton shutdown\n");
}
http://git-wip-us.apache.org/repos/asf/qpid-proton/blob/0d44f572/proton-c/src/windows/schannel.c
----------------------------------------------------------------------
diff --git a/proton-c/src/windows/schannel.c b/proton-c/src/windows/schannel.c
index 7aaf464..385267f 100644
--- a/proton-c/src/windows/schannel.c
+++ b/proton-c/src/windows/schannel.c
@@ -220,9 +220,9 @@ static int ssl_failed(pn_ssl_t *ssl, char *reason)
reason = buf;
}
ssl->ssl_closed = true;
- ssl->app_input_closed = ssl->app_output_closed = PN_ERR;
- ssl->transport->tail_closed = true;
+ ssl->app_input_closed = ssl->app_output_closed = PN_EOS;
ssl->state = SSL_CLOSED;
+ pni_close_tail(ssl->transport);
pn_do_error(ssl->transport, "amqp:connection:framing-error", "SSL Failure: %s", reason);
return PN_EOS;
}
@@ -255,6 +255,8 @@ static void ssl_session_free( pn_ssl_session_t *ssn)
pn_ssl_domain_t *pn_ssl_domain( pn_ssl_mode_t mode )
{
+ if (mode == PN_SSL_MODE_SERVER)
+ return NULL; // Temporary: not ready for ctest, hide from isSSLPresent()
pn_ssl_domain_t *domain = (pn_ssl_domain_t *) calloc(1, sizeof(pn_ssl_domain_t));
if (!domain) return NULL;
@@ -284,8 +286,9 @@ pn_ssl_domain_t *pn_ssl_domain( pn_ssl_mode_t mode )
void pn_ssl_domain_free( pn_ssl_domain_t *domain )
{
- if (--domain->ref_count == 0) {
+ if (!domain) return;
+ if (--domain->ref_count == 0) {
if (domain->cert_context)
CertFreeCertificateContext(domain->cert_context);
if (domain->cert_store)
@@ -1118,7 +1121,7 @@ static ssize_t process_input_ssl(pn_io_layer_t *io_layer, const char *input_data
static ssize_t process_output_ssl( pn_io_layer_t *io_layer, char *buffer, size_t max_len)
{
pn_ssl_t *ssl = (pn_ssl_t *)io_layer->context;
- if (!ssl) return PN_ERR;
+ if (!ssl) return PN_EOS;
ssl_log( ssl, "process_output_ssl( max_len=%d )\n",max_len );
ssize_t written = 0;
@@ -1129,7 +1132,7 @@ static ssize_t process_output_ssl( pn_io_layer_t *io_layer, char *buffer, size_t
// output buffers eclusively for internal handshake use until negotiation complete
client_handshake_init(ssl);
if (ssl->state == SSL_CLOSED)
- return PN_ERR;
+ return PN_EOS;
ssl->state = NEGOTIATING;
}
http://git-wip-us.apache.org/repos/asf/qpid-proton/blob/0d44f572/tests/python/proton_tests/common.py
----------------------------------------------------------------------
diff --git a/tests/python/proton_tests/common.py b/tests/python/proton_tests/common.py
index 05e01fd..cfb7e3d 100644
--- a/tests/python/proton_tests/common.py
+++ b/tests/python/proton_tests/common.py
@@ -82,7 +82,7 @@ def isSSLPresent():
""" True if a suitable SSL library is available.
"""
try:
- xxx = SSLDomain(SSLDomain.MODE_CLIENT)
+ xxx = SSLDomain(SSLDomain.MODE_SERVER)
return True
except SSLUnavailable, e:
# SSL libraries not installed
http://git-wip-us.apache.org/repos/asf/qpid-proton/blob/0d44f572/tests/python/proton_tests/messenger.py
----------------------------------------------------------------------
diff --git a/tests/python/proton_tests/messenger.py b/tests/python/proton_tests/messenger.py
index f3dcda4..db815b7 100644
--- a/tests/python/proton_tests/messenger.py
+++ b/tests/python/proton_tests/messenger.py
@@ -984,6 +984,11 @@ class Pump:
class SelectableMessengerTest(common.Test):
def testSelectable(self, count = 1):
+ if os.name=="nt":
+ # Conflict between native OS select() in Pump and IOCP based pn_selector_t
+ # makes this fail on Windows (see PROTON-668).
+ raise Skipped("Invalid test on Windows with IOCP.")
+
mrcv = Messenger()
mrcv.passive = True
mrcv.subscribe("amqp://~0.0.0.0:1234")
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