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Changing semantics of Broker's remote logging to match old communication framework.

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Broker had changed the semantics of remote logging: it sent over the
original Bro record containing the values to be logged, which on the
receiving side would then pass through the logging framework normally,
including triggering filters and events. The old communication system
however special-cases logs: it sends already processed log entries,
just as they go into the log files, and without any receiver-side
filtering etc. This more efficient as it short-cuts the processing
path, and also avoids the more expensive Val serialization. It also
lets the sender determine the specifics of what gets logged (and how).

This commit changes Broker over to now use the same semantics as the
old communication system.

TODOs:
     - The new Broker code doesn't have consistent #ifdefs yet.

     - Right now, when a new log receiver connects, all existing logs
     are broadcasted out again to all current clients. That doesn't so
     any harm, but is unncessary. Need to add a way to send the
     existing logs to just the new client.
This commit is contained in:
Robin Sommer 2017-01-31 21:51:31 -08:00
parent 0dd0bfb5bb
commit a5e9a535a5
25 changed files with 1178 additions and 159 deletions
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8
src/logging/WriterFrontend.h
View file

@ -38,12 +38,15 @@ public:
*
* local: If true, the writer will instantiate a local backend.
*
* remote: If true, the writer will forward all data to remote
* remote: If true, the writer will forward logs to remote
* clients.
*
* remote_flags: Broker flags controlling where remote logs are
* propagated to.
*
* Frontends must only be instantiated by the main thread.
*/
WriterFrontend(const WriterBackend::WriterInfo& info, EnumVal* stream, EnumVal* writer, bool local, bool remote);
WriterFrontend(const WriterBackend::WriterInfo& info, EnumVal* stream, EnumVal* writer, bool local, bool remote, int arg_remote_flags);
/**
* Destructor.
@ -214,6 +217,7 @@ protected:
bool buf; // True if buffering is enabled (default).
bool local; // True if logging locally.
bool remote; // True if loggin remotely.
int remote_flags; // Broker propagation flags.
const char* name; // Descriptive name of the
WriterBackend::WriterInfo* info; // The writer information.