SERVER-30170 Embedded can now shutdown and re-initialize.

- ServiceContext* is now closer to be an instance context for the database. We still don't support multiple instances but I wrote the new code with this in mind. Teardown and reinitialize then becomes a matter of being able to delete and re-create the ServiceContext*.
- Use the new MONGO_INITIALIZER that supports deinit/reinit to be able to re-initialize global systems that are decorations on ServiceContext.
- Move creation/destruction of ServiceContext* out of MONGO_INITIALIZER. This so we can hold an exclusive lock during as much as possible of the shutdown (like how mongod does)
- New ServiceContext registrer where we can link in different implementations of ServiceContext (replaces the SetGlobalEnvironment MONGO_INITIALIZER)
- As a result the SetGlobalEnvironment prerequisite for MONGO_INITIALIZERs is gone.
- The ServiceContext is passed to runGlobalInitializers, put in InitializationContext/DeinitializationContext so the initializers know which context they operate on.

1 files changed, 1 insertions, 1 deletions

diff --git a/src/mongo/db/storage/wiredtiger/wiredtiger_extensions.cpp b/src/mongo/db/storage/wiredtiger/wiredtiger_extensions.cpp
index f9bd90126e2..b0149c0b5aa 100644
--- a/src/mongo/db/storage/wiredtiger/wiredtiger_extensions.cpp
+++ b/src/mongo/db/storage/wiredtiger/wiredtiger_extensions.cpp
@@ -38,7 +38,7 @@
 
 namespace mongo {
 
-MONGO_INITIALIZER_WITH_PREREQUISITES(SetWiredTigerExtensions, ("SetGlobalEnvironment"))
+MONGO_INITIALIZER(SetWiredTigerExtensions)
 (InitializerContext* context) {
     auto configHooks = stdx::make_unique<WiredTigerExtensions>();
     WiredTigerExtensions::set(getGlobalServiceContext(), std::move(configHooks));