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Implement notifiers.

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The notifier thread is lazily started when the first notifier is added.
This avoids the extra thread/processing overhead when notifiers are not used.
This commit is contained in:
Peter Johnson
2015-08-02 21:47:01 -07:00
parent 538a19fd47
commit e9073a3cc0
9 changed files with 289 additions and 18 deletions
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30
src/Storage.cpp
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@@ -19,7 +19,7 @@ using namespace nt;
ATOMIC_STATIC_INIT(Storage)
Storage::Storage() {}
Storage::Storage(Notifier& notifier) : m_notifier(notifier) {}
Storage::~Storage() {}
@@ -77,6 +77,9 @@ void Storage::ProcessIncoming(std::shared_ptr<Message> msg,
entry->id = id;
m_idmap.push_back(entry);
// notify
m_notifier.NotifyEntry(name, entry->value, true);
// send the assignment to everyone (including the originator)
if (m_queue_outgoing) {
auto queue_outgoing = m_queue_outgoing;
@@ -113,12 +116,17 @@ void Storage::ProcessIncoming(std::shared_ptr<Message> msg,
new_entry.reset(new Entry(name));
new_entry->value = msg->value();
new_entry->flags = msg->flags();
} else
may_need_update = true; // we may need to send an update message
new_entry->id = id;
m_idmap[id] = new_entry.get();
// notify
m_notifier.NotifyEntry(name, new_entry->value, true);
return;
}
may_need_update = true; // we may need to send an update message
entry = new_entry.get();
entry->id = id;
m_idmap[id] = entry;
return;
}
}
@@ -151,6 +159,9 @@ void Storage::ProcessIncoming(std::shared_ptr<Message> msg,
// don't update flags from a <3.0 remote (not part of message)
if (conn->proto_rev() >= 0x0300) entry->flags = msg->flags();
// notify
m_notifier.NotifyEntry(name, entry->value, false);
// broadcast to all other connections (note for client there won't
// be any other connections, so don't bother)
if (m_server && m_queue_outgoing) {
@@ -182,6 +193,9 @@ void Storage::ProcessIncoming(std::shared_ptr<Message> msg,
entry->value = msg->value();
entry->seq_num = seq_num;
// notify
m_notifier.NotifyEntry(entry->name, entry->value, false);
// broadcast to all other connections (note for client there won't
// be any other connections, so don't bother)
if (m_server && m_queue_outgoing) {
@@ -511,6 +525,14 @@ std::vector<EntryInfo> Storage::GetEntryInfo(StringRef prefix,
return infos;
}
void Storage::NotifyEntries(StringRef prefix) {
std::lock_guard<std::mutex> lock(m_mutex);
for (auto& i : m_entries) {
if (!i.getKey().startswith(prefix)) continue;
m_notifier.NotifyEntry(i.getKey(), i.getValue()->value, false);
}
}
/* Escapes and writes a string, including start and end double quotes */
static void WriteString(std::ostream& os, llvm::StringRef str) {
os << '"';