Fixing Windows build using CMake (#7854)

Summary:
Builds were not producing Windows binaries properly in 6.15 branch:

```
00:00:46.413 Tests run: 11, Failures: 0, Errors: 2, Skipped: 0, Time elapsed: 0.183 sec <<< FAILURE! - in org.rocksdb.EventListenerTest
00:00:46.414 testAllCallbacksInvocation(org.rocksdb.EventListenerTest)  Time elapsed: 0.012 sec  <<< ERROR!
00:00:46.414 java.lang.UnsatisfiedLinkError: org.rocksdb.test.TestableEventListener.invokeAllCallbacks(J)V
00:00:46.414 	at org.rocksdb.test.TestableEventListener.invokeAllCallbacks(Native Method)
00:00:46.414 	at org.rocksdb.test.TestableEventListener.invokeAllCallbacks(TestableEventListener.java:19)
00:00:46.414 	at org.rocksdb.EventListenerTest.testAllCallbacksInvocation(EventListenerTest.java:436)
```

```
00:00:41.497        "D:\j\workspace\RocksDB_Build_Windows\build\java\rocksdbjni_headers.vcxproj" (default target) (3) ->
00:00:41.497        (CustomBuild target) ->
00:00:41.497          CUSTOMBUILD : error : Could not find class file for 'org.rocksdb.TestableEventListener'. [D:\j\workspace\RocksDB_Build_Windows\build\java\rocksdbjni_headers.vcxproj]
```

Also failed on Linux as library was not initialized yet:

```
00:01:25.103 Running org.rocksdb.NativeComparatorWrapperTest
00:01:25.133 Tests run: 1, Failures: 0, Errors: 1, Skipped: 0, Time elapsed: 0.006 sec <<< FAILURE! - in org.rocksdb.NativeComparatorWrapperTest
00:01:25.133 rountrip(org.rocksdb.NativeComparatorWrapperTest)  Time elapsed: 0.002 sec  <<< ERROR!
00:01:25.133 java.lang.UnsatisfiedLinkError: org.rocksdb.NativeComparatorWrapperTest$NativeStringComparatorWrapper.newStringComparator()J
00:01:25.133 	at org.rocksdb.NativeComparatorWrapperTest$NativeStringComparatorWrapper.newStringComparator(Native Method)
00:01:25.133 	at org.rocksdb.NativeComparatorWrapperTest$NativeStringComparatorWrapper.initializeNative(NativeComparatorWrapperTest.java:87)
00:01:25.133 	at org.rocksdb.RocksCallbackObject.<init>(RocksCallbackObject.java:28)
00:01:25.133 	at org.rocksdb.AbstractComparator.<init>(AbstractComparator.java:20)
00:01:25.133 	at org.rocksdb.NativeComparatorWrapper.<init>(NativeComparatorWrapper.java:16)
00:01:25.133 	at org.rocksdb.NativeComparatorWrapperTest$NativeStringComparatorWrapper.<init>(NativeComparatorWrapperTest.java:82)
00:01:25.133 	at org.rocksdb.NativeComparatorWrapperTest.rountrip(NativeComparatorWrapperTest.java:30)
```

Pull Request resolved: https://github.com/facebook/rocksdb/pull/7854

Reviewed By: jay-zhuang

Differential Revision: D25873378

Pulled By: ajkr

fbshipit-source-id: 88afb08bfd30edff31f17da063e636df0769cbfe

java/CMakeLists.txt

@@ -65,6 +65,7 @@ set(JNI_NATIVE_SOURCES
         rocksjni/table.cc
         rocksjni/table_filter.cc
         rocksjni/table_filter_jnicallback.cc
+        rocksjni/testable_event_listener.cc
         rocksjni/thread_status.cc
         rocksjni/trace_writer.cc
         rocksjni/trace_writer_jnicallback.cc
@@ -283,6 +284,7 @@ set(JAVA_TEST_CLASSES
   src/test/java/org/rocksdb/WriteBatchTest.java
   src/test/java/org/rocksdb/util/CapturingWriteBatchHandler.java
   src/test/java/org/rocksdb/util/WriteBatchGetter.java
+  src/test/java/org/rocksdb/test/TestableEventListener.java
 )
 
 include(FindJava)
@@ -434,6 +436,8 @@ if(${CMAKE_VERSION} VERSION_LESS "3.11.4" OR (${Java_VERSION_MINOR} STREQUAL "7"
           org.rocksdb.CompactRangeOptions
           org.rocksdb.ComparatorOptions
           org.rocksdb.CompressionOptions
+          org.rocksdb.ConcurrentTaskLimiterImpl
+          org.rocksdb.ConfigOptions
           org.rocksdb.DBOptions
           org.rocksdb.DirectSlice
           org.rocksdb.Env
@@ -502,6 +506,7 @@ if(${CMAKE_VERSION} VERSION_LESS "3.11.4" OR (${Java_VERSION_MINOR} STREQUAL "7"
           org.rocksdb.WriteBatchTest
           org.rocksdb.WriteBatchTestInternalHelper
           org.rocksdb.WriteBufferManager
+          org.rocksdb.test.TestableEventListener
   )
 
   create_javah(

java/src/test/java/org/rocksdb/NativeComparatorWrapperTest.java

@@ -15,6 +15,9 @@ import java.util.Comparator;
 import static org.junit.Assert.assertEquals;
 
 public class NativeComparatorWrapperTest {
+  static {
+    RocksDB.loadLibrary();
+  }
 
   @Rule
   public TemporaryFolder dbFolder = new TemporaryFolder();

utilities/blob_db/blob_db_test.cc

@@ -828,8 +828,7 @@ TEST_F(BlobDBTest, SstFileManagerRestart) {
   const auto &fs = db_options.env->GetFileSystem();
   ASSERT_OK(CreateFile(fs, blob_dir + "/000666.blob.trash", "", false));
   ASSERT_OK(CreateFile(fs, blob_dir + "/000888.blob.trash", "", true));
-  ASSERT_OK(
-      CreateFile(fs, blob_dir + "/something_not_match.trash", "", false));
+  ASSERT_OK(CreateFile(fs, blob_dir + "/something_not_match.trash", "", false));
 
   // Make sure that reopening the DB rescan the existing trash files
   Open(bdb_options, db_options);