diff options
author | Mark D. Roth <roth@google.com> | 2018-04-26 14:28:04 -0700 |
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committer | Mark D. Roth <roth@google.com> | 2018-04-26 14:28:04 -0700 |
commit | 6d21c8bdc402cf3eada383129b537150911a9b0a (patch) | |
tree | c14fc99e6febdd0e94e70ca63ed2251e7e8d4ada /src/core/ext/filters/client_channel/lb_policy/subchannel_list.h | |
parent | 757cd4105504b5ba8b23acc199907cf27c5233a5 (diff) |
Split StartOrRenewConnectivityWatchLocked() into two methods.
Diffstat (limited to 'src/core/ext/filters/client_channel/lb_policy/subchannel_list.h')
-rw-r--r-- | src/core/ext/filters/client_channel/lb_policy/subchannel_list.h | 63 |
1 files changed, 46 insertions, 17 deletions
diff --git a/src/core/ext/filters/client_channel/lb_policy/subchannel_list.h b/src/core/ext/filters/client_channel/lb_policy/subchannel_list.h index 5fb92e22f4..f5799b7c61 100644 --- a/src/core/ext/filters/client_channel/lb_policy/subchannel_list.h +++ b/src/core/ext/filters/client_channel/lb_policy/subchannel_list.h @@ -111,8 +111,9 @@ class SubchannelData { // Synchronously checks the subchannel's connectivity state. Calls // ProcessConnectivityChangeLocked() if the state has changed. // Must not be called while there is a connectivity notification - // pending (i.e., between calling StartOrRenewConnectivityWatchLocked() - // and the resulting invocation of ProcessConnectivityChangeLocked()). + // pending (i.e., between calling StartConnectivityWatchLocked() or + // RenewConnectivityWatchLocked() and the resulting invocation of + // ProcessConnectivityChangeLocked()). void CheckConnectivityStateLocked() { GPR_ASSERT(!connectivity_notification_pending_); grpc_error* error = GRPC_ERROR_NONE; @@ -133,18 +134,22 @@ class SubchannelData { // being unreffed. virtual void UnrefSubchannelLocked(const char* reason); - // Starts or renewes watching the connectivity state of the subchannel. + // Starts watching the connectivity state of the subchannel. // ProcessConnectivityChangeLocked() will be called when the // connectivity state changes. - void StartOrRenewConnectivityWatchLocked(); + void StartConnectivityWatchLocked(); + + // Renews watching the connectivity state of the subchannel. + void RenewConnectivityWatchLocked(); // Stops watching the connectivity state of the subchannel. void StopConnectivityWatchLocked(); // Cancels watching the connectivity state of the subchannel. // Must be called only while there is a connectivity notification - // pending (i.e., between calling StartOrRenewConnectivityWatchLocked() - // and the resulting invocation of ProcessConnectivityChangeLocked()). + // pending (i.e., between calling StartConnectivityWatchLocked() or + // RenewConnectivityWatchLocked() and the resulting invocation of + // ProcessConnectivityChangeLocked()). // From within ProcessConnectivityChangeLocked(), use // StopConnectivityWatchLocked() instead. void CancelConnectivityWatchLocked(const char* reason); @@ -162,12 +167,13 @@ class SubchannelData { virtual ~SubchannelData(); - // After StartOrRenewConnectivityWatchLocked() is called, this method - // will be invoked when the subchannel's connectivity state changes. + // After StartConnectivityWatchLocked() or RenewConnectivityWatchLocked() + // is called, this method will be invoked when the subchannel's connectivity + // state changes. // Implementations can use connectivity_state() to get the new // connectivity state. - // Implementations must invoke either StopConnectivityWatch() or again - // call StartOrRenewConnectivityWatch() before returning. + // Implementations must invoke either RenewConnectivityWatchLocked() or + // StopConnectivityWatchLocked() before returning. virtual void ProcessConnectivityChangeLocked(grpc_error* error) GRPC_ABSTRACT; private: @@ -252,6 +258,8 @@ class SubchannelList TraceFlag* tracer_; + grpc_combiner* combiner_; + // The list of subchannels. SubchannelVector subchannels_; @@ -313,21 +321,39 @@ void SubchannelData<SubchannelListType, SubchannelDataType>:: template <typename SubchannelListType, typename SubchannelDataType> void SubchannelData<SubchannelListType, - SubchannelDataType>::StartOrRenewConnectivityWatchLocked() { + SubchannelDataType>::StartConnectivityWatchLocked() { if (subchannel_list_->tracer()->enabled()) { gpr_log(GPR_DEBUG, "[%s %p] subchannel list %p index %" PRIuPTR " of %" PRIuPTR - " (subchannel %p): requesting connectivity change " + " (subchannel %p): starting watch: requesting connectivity change " "notification (from %s)", subchannel_list_->tracer()->name(), subchannel_list_->policy(), subchannel_list_, Index(), subchannel_list_->num_subchannels(), subchannel_, grpc_connectivity_state_name(pending_connectivity_state_unsafe_)); } - if (!connectivity_notification_pending_) { - subchannel_list()->Ref(DEBUG_LOCATION, "connectivity_watch").release(); - connectivity_notification_pending_ = true; + GPR_ASSERT(!connectivity_notification_pending_); + connectivity_notification_pending_ = true; + subchannel_list()->Ref(DEBUG_LOCATION, "connectivity_watch").release(); + grpc_subchannel_notify_on_state_change( + subchannel_, subchannel_list_->policy()->interested_parties(), + &pending_connectivity_state_unsafe_, &connectivity_changed_closure_); +} + +template <typename SubchannelListType, typename SubchannelDataType> +void SubchannelData<SubchannelListType, + SubchannelDataType>::RenewConnectivityWatchLocked() { + if (subchannel_list_->tracer()->enabled()) { + gpr_log(GPR_DEBUG, + "[%s %p] subchannel list %p index %" PRIuPTR " of %" PRIuPTR + " (subchannel %p): renewing watch: requesting connectivity change " + "notification (from %s)", + subchannel_list_->tracer()->name(), subchannel_list_->policy(), + subchannel_list_, Index(), subchannel_list_->num_subchannels(), + subchannel_, + grpc_connectivity_state_name(pending_connectivity_state_unsafe_)); } + GPR_ASSERT(connectivity_notification_pending_); grpc_subchannel_notify_on_state_change( subchannel_, subchannel_list_->policy()->interested_parties(), &pending_connectivity_state_unsafe_, &connectivity_changed_closure_); @@ -360,6 +386,7 @@ void SubchannelData<SubchannelListType, SubchannelDataType>:: subchannel_list_, Index(), subchannel_list_->num_subchannels(), subchannel_, reason); } + GPR_ASSERT(connectivity_notification_pending_); grpc_subchannel_notify_on_state_change(subchannel_, nullptr, nullptr, &connectivity_changed_closure_); } @@ -427,7 +454,7 @@ void SubchannelData<SubchannelListType, SubchannelDataType>:: // Get or release ref to connected subchannel. if (!sd->UpdateConnectedSubchannelLocked()) { // We don't want to report this connectivity state, so renew the watch. - sd->StartOrRenewConnectivityWatchLocked(); + sd->RenewConnectivityWatchLocked(); return; } // Now that we're inside the combiner, copy the pending connectivity @@ -462,7 +489,8 @@ SubchannelList<SubchannelListType, SubchannelDataType>::SubchannelList( const grpc_channel_args& args) : InternallyRefCountedWithTracing<SubchannelListType>(tracer), policy_(policy), - tracer_(tracer) { + tracer_(tracer), + combiner_(GRPC_COMBINER_REF(combiner, "subchannel_list")) { if (tracer_->enabled()) { gpr_log(GPR_DEBUG, "[%s %p] Creating subchannel list %p for %" PRIuPTR " subchannels", @@ -523,6 +551,7 @@ SubchannelList<SubchannelListType, SubchannelDataType>::~SubchannelList() { gpr_log(GPR_DEBUG, "[%s %p] Destroying subchannel_list %p", tracer_->name(), policy_, this); } + GRPC_COMBINER_UNREF(combiner_, "subchannel_list"); } template <typename SubchannelListType, typename SubchannelDataType> |