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java.lang.Objectcom.yahoo.ycsb.DB
com.yahoo.ycsb.BasicDB
public class BasicDB
Basic DB that just prints out the requested operations, instead of doing them against a database.
Field Summary | |
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static java.lang.String |
SIMULATE_DELAY
|
static java.lang.String |
SIMULATE_DELAY_DEFAULT
|
static java.lang.String |
VERBOSE
|
static java.lang.String |
VERBOSE_DEFAULT
|
Constructor Summary | |
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BasicDB()
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Method Summary | |
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int |
delete(java.lang.String table,
java.lang.String key)
Delete a record from the database. |
void |
init()
Initialize any state for this DB. |
int |
insert(java.lang.String table,
java.lang.String key,
java.util.HashMap<java.lang.String,java.lang.String> values)
Insert a record in the database. |
int |
read(java.lang.String table,
java.lang.String key,
java.util.Set<java.lang.String> fields,
java.util.HashMap<java.lang.String,java.lang.String> result)
Read a record from the database. |
int |
scan(java.lang.String table,
java.lang.String startkey,
int recordcount,
java.util.Set<java.lang.String> fields,
java.util.Vector<java.util.HashMap<java.lang.String,java.lang.String>> result)
Perform a range scan for a set of records in the database. |
int |
update(java.lang.String table,
java.lang.String key,
java.util.HashMap<java.lang.String,java.lang.String> values)
Update a record in the database. |
Methods inherited from class com.yahoo.ycsb.DB |
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cleanup, getProperties, setProperties |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Field Detail |
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public static final java.lang.String VERBOSE
public static final java.lang.String VERBOSE_DEFAULT
public static final java.lang.String SIMULATE_DELAY
public static final java.lang.String SIMULATE_DELAY_DEFAULT
Constructor Detail |
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public BasicDB()
Method Detail |
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public void init()
init
in class DB
public int read(java.lang.String table, java.lang.String key, java.util.Set<java.lang.String> fields, java.util.HashMap<java.lang.String,java.lang.String> result)
read
in class DB
table
- The name of the tablekey
- The record key of the record to read.fields
- The list of fields to read, or null for all of themresult
- A HashMap of field/value pairs for the result
public int scan(java.lang.String table, java.lang.String startkey, int recordcount, java.util.Set<java.lang.String> fields, java.util.Vector<java.util.HashMap<java.lang.String,java.lang.String>> result)
scan
in class DB
table
- The name of the tablestartkey
- The record key of the first record to read.recordcount
- The number of records to readfields
- The list of fields to read, or null for all of themresult
- A Vector of HashMaps, where each HashMap is a set field/value pairs for one record
public int update(java.lang.String table, java.lang.String key, java.util.HashMap<java.lang.String,java.lang.String> values)
update
in class DB
table
- The name of the tablekey
- The record key of the record to write.values
- A HashMap of field/value pairs to update in the record
public int insert(java.lang.String table, java.lang.String key, java.util.HashMap<java.lang.String,java.lang.String> values)
insert
in class DB
table
- The name of the tablekey
- The record key of the record to insert.values
- A HashMap of field/value pairs to insert in the record
public int delete(java.lang.String table, java.lang.String key)
delete
in class DB
table
- The name of the tablekey
- The record key of the record to delete.
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