From 0bed084b469e8aef409de0f4204013d5b1060948 Mon Sep 17 00:00:00 2001
From: Henning Baldersheim <balder@yahoo-inc.com>
Date: Tue, 2 Feb 2021 20:59:47 +0000
Subject: Remove the sync interface from Bucket Executor. Due to the nature of
 requiring a bucket lock it is very hard to get sync to work in a safe way.
 Instead the users must do their own accounting as they know their own
 threading model.

---
 .../src/vespa/persistence/dummyimpl/dummy_bucket_executor.h  |  2 +-
 .../src/vespa/persistence/dummyimpl/dummypersistence.cpp     | 12 ++++--------
 persistence/src/vespa/persistence/spi/bucketexecutor.h       |  1 -
 3 files changed, 5 insertions(+), 10 deletions(-)

(limited to 'persistence')

diff --git a/persistence/src/vespa/persistence/dummyimpl/dummy_bucket_executor.h b/persistence/src/vespa/persistence/dummyimpl/dummy_bucket_executor.h
index b832cb6c02c..2479787eb31 100644
--- a/persistence/src/vespa/persistence/dummyimpl/dummy_bucket_executor.h
+++ b/persistence/src/vespa/persistence/dummyimpl/dummy_bucket_executor.h
@@ -18,7 +18,7 @@ public:
     DummyBucketExecutor(size_t numExecutors);
     ~DummyBucketExecutor() override;
     std::unique_ptr<BucketTask> execute(const Bucket & bucket, std::unique_ptr<BucketTask> task) override;
-    void sync() override;
+    void sync();
 private:
     std::unique_ptr<vespalib::SyncableThreadExecutor> _executor;
     std::mutex                                        _lock;
diff --git a/persistence/src/vespa/persistence/dummyimpl/dummypersistence.cpp b/persistence/src/vespa/persistence/dummyimpl/dummypersistence.cpp
index 0865500d3c0..305f1c81192 100644
--- a/persistence/src/vespa/persistence/dummyimpl/dummypersistence.cpp
+++ b/persistence/src/vespa/persistence/dummyimpl/dummypersistence.cpp
@@ -866,14 +866,10 @@ DummyPersistence::register_resource_usage_listener(IResourceUsageListener &liste
 
 namespace {
 
-class SyncExecutorOnDestruction : public vespalib::IDestructorCallback {
+class ExecutorRegistration : public vespalib::IDestructorCallback {
 public:
-    explicit SyncExecutorOnDestruction(std::shared_ptr<BucketExecutor> executor) : _executor(std::move(executor)) { }
-    ~SyncExecutorOnDestruction() override {
-        if (_executor) {
-            _executor->sync();
-        }
-    }
+    explicit ExecutorRegistration(std::shared_ptr<BucketExecutor> executor) : _executor(std::move(executor)) { }
+    ~ExecutorRegistration() override = default;
 private:
     std::shared_ptr<BucketExecutor> _executor;
 };
@@ -885,7 +881,7 @@ DummyPersistence::register_executor(std::shared_ptr<BucketExecutor> executor)
 {
     assert(_bucket_executor.expired());
     _bucket_executor = executor;
-    return std::make_unique<SyncExecutorOnDestruction>(executor);
+    return std::make_unique<ExecutorRegistration>(executor);
 }
 
 std::string
diff --git a/persistence/src/vespa/persistence/spi/bucketexecutor.h b/persistence/src/vespa/persistence/spi/bucketexecutor.h
index 8237b78cca0..d1ada30959e 100644
--- a/persistence/src/vespa/persistence/spi/bucketexecutor.h
+++ b/persistence/src/vespa/persistence/spi/bucketexecutor.h
@@ -29,7 +29,6 @@ public:
 struct BucketExecutor {
     virtual ~BucketExecutor() = default;
     virtual std::unique_ptr<BucketTask> execute(const Bucket & bucket, std::unique_ptr<BucketTask> task) = 0;
-    virtual void sync() = 0;
 };
 
 }
-- 
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