execution service: implement WaitExecution and google::longrunning::Operations::GetOperation

For each action that is executed, an entry is added to a shared thread
safe cache. Once the number of operations stored exceeds twice 2^n,
where n is given by the option --log-operations-threshold, at most 2^n
operations will be removed, in a FIFO scheme.

1 files changed, 4 insertions, 0 deletions

diff --git a/src/buildtool/main/main.cpp b/src/buildtool/main/main.cpp
index 869ed146..a3f985b7 100644
--- a/src/buildtool/main/main.cpp
+++ b/src/buildtool/main/main.cpp
@@ -40,6 +40,7 @@
 #include "src/buildtool/main/install_cas.hpp"
 #ifndef BOOTSTRAP_BUILD_TOOL
 #include "src/buildtool/auth/authentication.hpp"
+#include "src/buildtool/execution_api/execution_service/operation_cache.hpp"
 #include "src/buildtool/execution_api/execution_service/server_implementation.hpp"
 #include "src/buildtool/execution_api/local/garbage_collector.hpp"
 #include "src/buildtool/graph_traverser/graph_traverser.hpp"
@@ -427,6 +428,9 @@ void SetupExecutionServiceConfig(ExecutionServiceArguments const& args) {
             std::exit(kExitFailure);
         }
     }
+    if (args.op_exponent) {
+        OperationCache::SetExponent(*args.op_exponent);
+    }
 }
 
 void SetupHashFunction() {