Minor fix in rocksdb jni library.
Summary: Fix a bug in RocksDBSample.java and minor code improvement in rocksjni.cc. Test Plan: make jni make jtest Reviewers: haobo, sdong Reviewed By: haobo CC: leveldb Differential Revision: https://reviews.facebook.net/D17325
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@ -62,7 +62,7 @@ public class RocksDBSample {
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byte[] enoughArray = new byte[50];
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int len;
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len = db.get(testKey, insufficientArray);
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assert(len > testKey.length);
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assert(len > insufficientArray.length);
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len = db.get("asdfjkl;".getBytes(), enoughArray);
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assert(len == RocksDB.NOT_FOUND);
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len = db.get(testKey, enoughArray);
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@ -34,7 +34,9 @@ public class RocksDB implements Closeable {
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}
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@Override public void close() throws IOException {
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close0();
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if (nativeHandle != 0) {
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close0();
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}
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}
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/**
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@ -121,6 +121,9 @@ jint Java_org_rocksdb_RocksDB_get___3BI_3BI(
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JNIEnv* env, jobject jdb,
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jbyteArray jkey, jint jkey_len,
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jbyteArray jvalue, jint jvalue_len) {
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static const int kNotFound = -1;
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static const int kStatusError = -2;
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rocksdb::DB* db = rocksdb::RocksDBJni::getHandle(env, jdb);
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jboolean isCopy;
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@ -142,24 +145,29 @@ jint Java_org_rocksdb_RocksDB_get___3BI_3BI(
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if (s.IsNotFound()) {
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env->ReleaseByteArrayElements(jvalue, value, JNI_ABORT);
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return -1;
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} else if (s.ok()) {
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int cvalue_len = static_cast<int>(cvalue.size());
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int length = cvalue_len;
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// currently we prevent overflowing.
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if (length > jvalue_len) {
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length = jvalue_len;
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}
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memcpy(value, cvalue.c_str(), length);
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env->ReleaseByteArrayElements(jvalue, value, JNI_COMMIT);
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if (cvalue_len > length) {
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return static_cast<jint>(cvalue.size());
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}
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return length;
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}
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rocksdb::RocksDBExceptionJni::ThrowNew(env, s);
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return kNotFound;
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} else if (!s.ok()) {
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// Here since we are throwing a Java exception from c++ side.
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// As a result, c++ does not know calling this function will in fact
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// throwing an exception. As a result, the execution flow will
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// not stop here, and codes after this throw will still be
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// executed.
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rocksdb::RocksDBExceptionJni::ThrowNew(env, s);
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return -1;
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// Return a dummy const value to avoid compilation error, although
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// java side might not have a chance to get the return value :)
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return kStatusError;
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}
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int cvalue_len = static_cast<int>(cvalue.size());
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int length = std::min(jvalue_len, cvalue_len);
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memcpy(value, cvalue.c_str(), length);
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env->ReleaseByteArrayElements(jvalue, value, JNI_COMMIT);
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if (cvalue_len > length) {
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return static_cast<jint>(cvalue_len);
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}
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return length;
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}
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/*
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