-# $Id: IRSpy.pm,v 1.24 2006-10-10 13:16:31 mike Exp $
+# $Id: IRSpy.pm,v 1.25 2006-10-11 16:44:04 mike Exp $
package ZOOM::IRSpy;
my @connections;
foreach my $target (@{ $this->{targets} }) {
- my $conn = new ZOOM::IRSpy::Connection($this, $target, 0, async => 1);
+ my $conn = create ZOOM::IRSpy::Connection($this, async => 1);
+ $conn->option(host => $target);
my $record = delete $target2record{lc($target)};
$conn->record($record);
push @connections, $conn;
}
-# New approach:
-# 1. Gather declarative information about test hierarchy.
-# 2. For each connection, start the initial test -- invokes run().
-# 3. Run each connection's first queued task.
-# 4. while (1) { wait() }. Callbacks return a ZOOM::IRSpy::Status value
-# No individual test ever calls wait: tests just set up tasks.
+# The approach: gather declarative information about test hierarchy,
+# then go into a loop. In the loop, we ensure that each connection is
+# running a test, and within that test a task, until its list of tests
+# is exhausted. No individual test ever calls wait(): tests just queue
+# up tasks and return immediately. When the tasks are run (one at a
+# time on each connection) they generate events, and it is these that
+# are harvested by ZOOM::event(). Since each connection knows what
+# task it is running, it can invoke the appropriate callbacks.
+# Callbacks return a ZOOM::IRSpy::Status value which tells the main
+# loop how to continue.
+#
+# Invariants:
+# While a connection is running a task, its current_task()
+# points at the task structure. When it finishes its task,
+# next_task() is pointed at the next task to execute (if there
+# is one), and its current_task() is set to zero. When the next
+# task is executed, the connection's next_task() is set to zero
+# and its current_task() pointed to the task structure.
+# current_task() and next_task() are both zero only when there
+# are no more queued tasks, which is when a new test is
+# started.
+#
+# Each connection's current test is stored in its
+# "current_test_address" option. The next test to execute is
+# calculated by walking the declarative tree of tests. This
+# option begins empty; the "next test" after this is of course
+# the root test.
#
sub check {
my $this = shift();
$this->{tree} = $this->_gather_tests($tname)
or die "No tests defined";
#$this->{tree}->print(0);
+ my $nskipped = 0;
my @conn = @{ $this->{connections} };
- foreach my $conn (@conn) {
- $this->_start_test($conn, "");
- }
- while ((my $i0 = ZOOM::event(\@conn)) != 0) {
+ while (1) {
+ my @copy_conn = @conn; # avoid alias problems after splice()
+ foreach my $i0 (0 .. $#copy_conn) {
+ my $conn = $copy_conn[$i0];
+ #print "connection $i0 of ", scalar(@copy_conn), " from ", scalar(@conn), " is $conn\n";
+ if (!$conn->current_task()) {
+ if (!$conn->next_task()) {
+ # Out of tasks: we need a new test
+ NEXT_TEST:
+ my $address = $conn->option("current_test_address");
+ my $nextaddr = defined $address ?
+ $this->_next_test($address) : "";
+ if (!defined $nextaddr) {
+ $conn->log("irspy", "has no more tests: removing");
+ splice @conn, $i0, 1;
+ next;
+ }
+
+ my $node = $this->{tree}->select($nextaddr)
+ or die "invalid nextaddr '$nextaddr'";
+ $conn->option(current_test_address => $nextaddr);
+ my $tname = $node->name();
+ $conn->log("irspy", "starting test '$nextaddr' = $tname");
+ my $tasks = $conn->tasks();
+ my $oldcount = @$tasks;
+ "ZOOM::IRSpy::Test::$tname"->start($conn);
+ $tasks = $conn->tasks();
+ if (@$tasks > $oldcount) {
+ # Prepare to start the first of the newly added tasks
+ $conn->next_task($tasks->[$oldcount]);
+ } else {
+ $conn->log("irspy", "no tasks added by new test $tname");
+ goto NEXT_TEST;
+ }
+ }
+
+ my $task = $conn->next_task();
+ die "no next task queued for $conn" if !defined $task;
+ $conn->log("irspy", "starting task $task");
+ $conn->next_task(0);
+ $conn->current_task($task);
+ $task->run();
+ }
+
+ ### Test $conn->is_idle() here?
+ }
+
+ my $i0 = ZOOM::event(\@conn);
+ $this->log("irspy_event", "ZOOM_event(", scalar(@conn), " connections) = $i0");
+ last if $i0 == 0 || $i0 == -3; # no events or no connections
my $conn = $conn[$i0-1];
my $ev = $conn->last_event();
my $evstr = ZOOM::event_str($ev);
$conn->log("irspy_event", "event $ev ($evstr)");
my $task = $conn->current_task();
- my $res;
- eval {
- $conn->_check();
- }; if ($@) {
+ die "$conn has no current task for event $ev ($evstr)" if !$task;
+ eval { $conn->_check() };
+ if ($@ &&
+ ($ev == ZOOM::Event::RECV_DATA ||
+ $ev == ZOOM::Event::RECV_APDU ||
+ $ev == ZOOM::Event::ZEND)) {
# An error in, say, a search response, becomes visible to
# ZOOM before the Receive Data event is sent and persists
# until after the End, which means that successive events
# "unimportant" events. ### But this doesn't work for,
# say, a Connection Refused, as the only event that shows
# us this error is the End.
- if ($ev == ZOOM::Event::RECV_DATA ||
- $ev == ZOOM::Event::RECV_APDU ||
- $ev == ZOOM::Event::ZEND) {
- $conn->log("irspy_event", "ignoring error ",
- "on event $ev ($evstr): $@");
- } else {
- my $sub = $task->{cb}->{exception};
- die $@ if !defined $sub;
- $res = &$sub($conn, $task, $@);
- goto HANDLE_RESULT;
- }
+ $conn->log("irspy_event", "ignoring error ",
+ "on event $ev ($evstr): $@");
+ next;
}
- my $sub = $task ? $task->{cb}->{$ev} : undef;
- if (!defined $sub) {
- $conn->log("irspy_unhandled", "event $ev ($evstr)");
- # Catch the case of a pure-container test ending
- if ($ev == ZOOM::Event::ZEND && !$conn->current_task()) {
- $conn->log("irspy", "last event, no task queued");
- goto NEXT_TEST;
+ my $res;
+ if ($@) {
+ my $sub = $task->{cb}->{exception};
+ die $@ if !defined $sub;
+ $res = &$sub($conn, $task, $@);
+ } else {
+ my $sub = $task->{cb}->{$ev};
+ if (!defined $sub) {
+ $conn->log("irspy_unhandled", "event $ev ($evstr)");
+ next;
}
- next;
+
+ $res = &$sub($conn, $task, $ev);
}
- $res = &$sub($conn, $task, $ev);
- HANDLE_RESULT:
if ($res == ZOOM::IRSpy::Status::OK) {
# Nothing to do -- life continues
} elsif ($res == ZOOM::IRSpy::Status::TASK_DONE) {
my $task = $conn->current_task();
- die "can't happen" if !$task;
+ die "no task for TASK_DONE on $conn" if !$task;
+ die "next task already defined for $conn" if $conn->next_task();
$conn->log("irspy", "completed task $task");
- my $nexttask = $task->{next};
- if (defined $nexttask) {
- $conn->log("irspy_debug", "next task is '$nexttask'");
- $conn->start_task($nexttask);
- } else {
- $conn->log("irspy_debug", "jumping to NEXT_TEST");
- $conn->current_task(0);
- goto NEXT_TEST;
- }
-
- } elsif ($res == ZOOM::IRSpy::Status::TEST_GOOD) {
- $conn->log("irspy", "test completed (GOOD)");
- NEXT_TEST:
- my $address = $conn->option("address");
- my $nextaddr = $this->_next_test($address);
- if (defined $nextaddr) {
- $this->_start_test($conn, $nextaddr);
- } else {
- $conn->log("irspy", "has no tests after '$address'");
- # Nothing else to do: we will get no more meaningful
- # events on this connection, and when all the
- # connections have reached this state, ZOOM::event()
- # will return 0 and we will fall out of the loop.
- }
-
- } elsif ($res == ZOOM::IRSpy::Status::TEST_BAD) {
- $conn->log("irspy", "test completed (BAD)");
- ### Should skip over remaining sibling tests
- goto NEXT_TEST;
+ $conn->next_task($task->{next});
+ $conn->current_task(0);
+
+ } elsif ($res == ZOOM::IRSpy::Status::TEST_GOOD ||
+ $res == ZOOM::IRSpy::Status::TEST_BAD) {
+ my $x = ($res == ZOOM::IRSpy::Status::TEST_GOOD) ? "good" : "bad";
+ $conn->log("irspy", "test completed ($x)");
+ $conn->current_task(0);
+ $conn->next_task(0);
+ ### Should also skip over remaining sibling tests if TEST_BAD
+ $nskipped += 1; # should count number of skipped siblings
}
}
- $this->log("irspy_event", "ZOOM::event() returned 0");
+ $this->log("irspy_event", "no more events: finishing");
#$this->_rewrite_records();
- return 0; # What does this mean?
-}
-
-
-# Preconditions:
-# - called only when there no tasks remain for the connection
-# - called with valid address
-sub _start_test {
- my $this = shift();
- my($conn, $address) = @_;
- {
- my $task = $conn->current_task();
- die "_start_test(): $conn already has task $task"
- if $task;
- }
-
- my $node = $this->{tree}->select($address)
- or die "_start_test(): invalid address '$address'";
-
- $conn->option(address => $address);
- my $tname = $node->name();
- $conn->log("irspy", " starting test '$address' = $tname");
-
- # We will need to find the first of the tasks that are added by
- # the test we're about to start, so we can start that task. This
- # requires a little trickery: noting the current length of the
- # tasks array first, then fetching the next one off the end.
- my $alltasks = $conn->tasks();
- my $ntasks = defined $alltasks ? @$alltasks : 0;
- my $test = "ZOOM::IRSpy::Test::$tname"->start($conn);
-
- $alltasks = $conn->tasks();
- if (defined $alltasks && @$alltasks > $ntasks) {
- my $task = $alltasks->[$ntasks];
- $conn->start_task($task);
- } else {
- $this->log("irspy", "no tasks added for test '$address' = $tname");
- }
+ return $nskipped;
}
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