TDB (Apache Jena TDB)

java.lang.Object
- org.apache.jena.tdb.TDB

```
public class TDB
extends Object
```

Field Summary

Fields
Modifier and Type	Field and Description
`static String`	`BUILD_DATE` The date and time at which this release was built
`static org.slf4j.Logger`	`logInfo` Logger for general information
`static String`	`logInfoName` Logger for general information
`static org.slf4j.Logger`	`logLoader` Logger for loading information
`static String`	`logLoaderName` Logger for loading information
`static String`	`NAME`
`static String`	`namespace`
`static String`	`PATH` The root package name for TDB
`static Symbol`	`symUnionDefaultGraph` Symbol to use the union of named graphs as the default graph of a query
`static String`	`tdbIRI` IRI for TDB
`static String`	`tdbParamNS` Root of TDB-defined parameter names
`static String`	`tdbSymbolPrefix` Prefix for TDB-defined parameter names
`static Symbol`	`transactionJournalWriteBlockMode` A String enum Symbol that specifies the type of temporary storage for transaction journal write blocks.
`static String`	`VERSION` The full name of the current TDB version

Method Summary

All Methods Static Methods Concrete Methods
Modifier and Type	Method and Description
`static void`	`closedown()` Release any and all system resources held by TDB.
`static Context`	`getContext()`
`static void`	`init()` TDB System initialization - normally, this is not explicitly called because Jena system wide initialization occurs automatically.
`static void`	`setOptimizerWarningFlag(boolean b)` Set the global flag that control the "No BGP optimizer" warning.
`static void`	`sync(Dataset dataset)` Sync a TDB-backed Dataset.
`static void`	`sync(DatasetGraph dataset)` Sync a TDB-backed DatasetGraph.
`static void`	`sync(Graph graph)` Sync a TDB-backed Graph.
`static void`	`sync(Model model)` Sync a TDB-backed Model.

Methods inherited from class java.lang.Object
equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Field Detail
  - tdbIRI
```
public static final String tdbIRI
```
    IRI for TDB
    
    See Also:
    
    Constant Field Values
  - tdbParamNS
```
public static final String tdbParamNS
```
    Root of TDB-defined parameter names
    
    See Also:
    
    Constant Field Values
  - tdbSymbolPrefix
```
public static final String tdbSymbolPrefix
```
    Prefix for TDB-defined parameter names
    
    See Also:
    
    Constant Field Values
  - logLoaderName
```
public static final String logLoaderName
```
    Logger for loading information
    
    See Also:
    
    Constant Field Values
  - logLoader
```
public static final org.slf4j.Logger logLoader
```
    Logger for loading information
  - logInfoName
```
public static final String logInfoName
```
    Logger for general information
    
    See Also:
    
    Constant Field Values
  - logInfo
```
public static final org.slf4j.Logger logInfo
```
    Logger for general information
  - namespace
```
public static final String namespace
```
    See Also:
    
    Constant Field Values
  - symUnionDefaultGraph
```
public static final Symbol symUnionDefaultGraph
```
    Symbol to use the union of named graphs as the default graph of a query
  - transactionJournalWriteBlockMode
```
public static final Symbol transactionJournalWriteBlockMode
```
    A String enum Symbol that specifies the type of temporary storage for transaction journal write blocks.
    "mem" = Java heap memory (default)
    "direct" = Process heap memory
    "mapped" = Memory mapped temporary file
  - PATH
```
public static final String PATH
```
    The root package name for TDB
    
    See Also:
    
    Constant Field Values
  - NAME
```
public static final String NAME
```
    See Also:
    
    Constant Field Values
  - VERSION
```
public static final String VERSION
```
    The full name of the current TDB version
  - BUILD_DATE
```
public static final String BUILD_DATE
```
    The date and time at which this release was built
- Method Detail
  - getContext
```
public static Context getContext()
```
  - closedown
```
public static void closedown()
```
    Release any and all system resources held by TDB. This does NOT close or release datasets or graphs held by client code.
  - setOptimizerWarningFlag
```
public static void setOptimizerWarningFlag(boolean b)
```
    Set the global flag that control the "No BGP optimizer" warning. Set to false to silence the warning
  - sync
```
public static void sync(Model model)
```
    Sync a TDB-backed Model. Do nothing if not TDB-backed.
  - sync
```
public static void sync(Graph graph)
```
    Sync a TDB-backed Graph. Do nothing if not TDB-backed.
  - sync
```
public static void sync(Dataset dataset)
```
    Sync a TDB-backed Dataset. Do nothing if not TDB-backed.
  - sync
```
public static void sync(DatasetGraph dataset)
```
    Sync a TDB-backed DatasetGraph. Do nothing if not TDB-backed.
  - init
```
public static void init()
```
    TDB System initialization - normally, this is not explicitly called because Jena system wide initialization occurs automatically. However, calling it repeatedly is safe and low cost.

Class TDB

Field Summary

Method Summary

Methods inherited from class java.lang.Object

Field Detail

tdbIRI

tdbParamNS

tdbSymbolPrefix

logLoaderName

logLoader

logInfoName

logInfo

namespace

symUnionDefaultGraph

transactionJournalWriteBlockMode

PATH

NAME

VERSION

BUILD_DATE

Method Detail

getContext

closedown

setOptimizerWarningFlag

sync

sync

sync

sync

init