Add column family implementations for put/merge/delete

src/ffi.rs

@@ -190,6 +190,12 @@ extern {
                        k: *const u8, kLen: size_t,
                        v: *const u8, vLen: size_t,
                        err: *mut *const i8);
+    pub fn rocksdb_put_cf(db: RocksDBInstance,
+                       writeopts: RocksDBWriteOptions,
+                       cf: RocksDBCFHandle,
+                       k: *const u8, kLen: size_t,
+                       v: *const u8, vLen: size_t,
+                       err: *mut *const i8);
     pub fn rocksdb_readoptions_create() -> RocksDBReadOptions;
     pub fn rocksdb_readoptions_destroy(readopts: RocksDBReadOptions);
     pub fn rocksdb_readoptions_set_verify_checksums(
@@ -241,6 +247,12 @@ extern {
                           k: *const u8, kLen: size_t,
                           err: *mut *const i8
                           ) -> *mut c_void;
+    pub fn rocksdb_delete_cf(db: RocksDBInstance,
+                             writeopts: RocksDBWriteOptions,
+                             cf: RocksDBCFHandle,
+                             k: *const u8, kLen: size_t,
+                             err: *mut *const i8
+                             ) -> *mut c_void;
     pub fn rocksdb_close(db: RocksDBInstance);
     pub fn rocksdb_destroy_db(options: RocksDBOptions,
                               path: *const i8, err: *mut *const i8);
@@ -252,6 +264,12 @@ extern {
                          k: *const u8, kLen: size_t,
                          v: *const u8, vLen: size_t,
                          err: *mut *const i8);
+    pub fn rocksdb_merge_cf(db: RocksDBInstance,
+                         writeopts: RocksDBWriteOptions,
+                         cf: RocksDBCFHandle,
+                         k: *const u8, kLen: size_t,
+                         v: *const u8, vLen: size_t,
+                         err: *mut *const i8);
     pub fn rocksdb_mergeoperator_create(
         state: *mut c_void,
         destroy: extern fn(*mut c_void) -> (),

src/rocksdb.rs

@@ -163,8 +163,11 @@ impl <'a> Drop for Snapshot<'a> {
 // This is for the RocksDB and write batches to share the same API
 pub trait Writable {
     fn put(&self, key: &[u8], value: &[u8]) -> Result<(), String>;
+    fn put_cf(&self, cf: &str, key: &[u8], value: &[u8]) -> Result<(), String>;
     fn merge(&self, key: &[u8], value: &[u8]) -> Result<(), String>;
+    fn merge_cf(&self, cf: &str, key: &[u8], value: &[u8]) -> Result<(), String>;
     fn delete(&self, key: &[u8]) -> Result<(), String>;
+    fn delete_cf(&self, cf: &str, key: &[u8]) -> Result<(), String>;
 }
 
 fn error_message(ptr: *const i8) -> String {
@@ -392,7 +395,7 @@ impl RocksDB {
 }
 
 impl Writable for RocksDB {
-    fn put(&self, key: &[u8], value: &[u8]) -> Result<(), String> {
+   fn put(&self, key: &[u8], value: &[u8]) -> Result<(), String> {
         unsafe {
             let writeopts = rocksdb_ffi::rocksdb_writeoptions_create();
             let mut err: *const i8 = 0 as *const i8;
@@ -404,10 +407,30 @@ impl Writable for RocksDB {
             if !err.is_null() {
                 return Err(error_message(err));
             }
-            return Ok(())
+            Ok(())
         }
     }
 
+    fn put_cf(&self, cf_name: &str, key: &[u8], value: &[u8]) -> Result<(), String> {
+        let cf = self.cfs.get(cf_name);
+        if cf.is_none() {
+            return Err(format!("Invalid column family: {}", cf_name).to_string());
+        }
+        unsafe {
+            let writeopts = rocksdb_ffi::rocksdb_writeoptions_create();
+            let mut err: *const i8 = 0 as *const i8;
+            let err_ptr: *mut *const i8 = &mut err;
+            rocksdb_ffi::rocksdb_put_cf(self.inner, writeopts.clone(), *cf.unwrap(),
+                        key.as_ptr(), key.len() as size_t, value.as_ptr(),
+                        value.len() as size_t, err_ptr);
+            rocksdb_ffi::rocksdb_writeoptions_destroy(writeopts);
+            if !err.is_null() {
+                return Err(error_message(err));
+            }
+            Ok(())
+        }
+    }
+ 
     fn merge(&self, key: &[u8], value: &[u8]) -> Result<(), String> {
         unsafe {
             let writeopts = rocksdb_ffi::rocksdb_writeoptions_create();
@@ -420,7 +443,28 @@ impl Writable for RocksDB {
             if !err.is_null() {
                 return Err(error_message(err));
             }
-            return Ok(())
+            Ok(())
+        }
+    }
+    
+    fn merge_cf(&self, cf_name: &str, key: &[u8], value: &[u8]) -> Result<(), String> {
+        let cf = self.cfs.get(cf_name);
+        if cf.is_none() {
+            return Err(format!("Invalid column family: {}", cf_name).to_string());
+        }
+        unsafe {
+            let writeopts = rocksdb_ffi::rocksdb_writeoptions_create();
+            let mut err: *const i8 = 0 as *const i8;
+            let err_ptr: *mut *const i8 = &mut err;
+            rocksdb_ffi::rocksdb_merge_cf(self.inner, writeopts.clone(),
+                        *cf.unwrap(), key.as_ptr(),
+                        key.len() as size_t, value.as_ptr(),
+                        value.len() as size_t, err_ptr);
+            rocksdb_ffi::rocksdb_writeoptions_destroy(writeopts);
+            if !err.is_null() {
+                return Err(error_message(err));
+            }
+            Ok(())
         }
     }
 
@@ -435,7 +479,27 @@ impl Writable for RocksDB {
             if !err.is_null() {
                 return Err(error_message(err));
             }
-            return Ok(())
+            Ok(())
+        }
+    }
+
+    fn delete_cf(&self, cf_name: &str, key: &[u8]) -> Result<(), String> {
+        let cf = self.cfs.get(cf_name);
+        if cf.is_none() {
+            return Err(format!("Invalid column family: {}", cf_name).to_string());
+        }
+        unsafe {
+            let writeopts = rocksdb_ffi::rocksdb_writeoptions_create();
+            let mut err: *const i8 = 0 as *const i8;
+            let err_ptr: *mut *const i8 = &mut err;
+            rocksdb_ffi::rocksdb_delete_cf(self.inner, writeopts.clone(), 
+                                           *cf.unwrap(), key.as_ptr(),
+                                           key.len() as size_t, err_ptr);
+            rocksdb_ffi::rocksdb_writeoptions_destroy(writeopts);
+            if !err.is_null() {
+                return Err(error_message(err));
+            }
+            Ok(())
         }
     }
 }
@@ -475,26 +539,38 @@ impl Writable for WriteBatch {
             rocksdb_ffi::rocksdb_writebatch_put(self.inner, key.as_ptr(),
                         key.len() as size_t, value.as_ptr(),
                         value.len() as size_t);
-            return Ok(())
+            Ok(())
         }
     }
 
+    fn put_cf(&self, cf_name: &str, key: &[u8], value: &[u8]) -> Result<(), String> {
+        Err("not implemented for write batches yet".to_string())
+    }
+
     fn merge(&self, key: &[u8], value: &[u8]) -> Result<(), String> {
         unsafe {
             rocksdb_ffi::rocksdb_writebatch_merge(self.inner, key.as_ptr(),
                         key.len() as size_t, value.as_ptr(),
                         value.len() as size_t);
-            return Ok(())
+            Ok(())
         }
     }
 
+    fn merge_cf(&self, cf: &str, key: &[u8], value: &[u8]) -> Result<(), String> {
+        Err("not implemented for write batches yet".to_string())
+    }
+
     fn delete(&self, key: &[u8]) -> Result<(), String> {
         unsafe {
             rocksdb_ffi::rocksdb_writebatch_delete(self.inner, key.as_ptr(),
                         key.len() as size_t);
-            return Ok(())
+            Ok(())
         }
     }
+
+    fn delete_cf(&self, cf: &str, key: &[u8]) -> Result<(), String> {
+        Err("not implemented for write batches yet".to_string())
+    }
 }
 
 impl Drop for ReadOptions {