|
||||||||||
PREV CLASS NEXT CLASS | FRAMES NO FRAMES | |||||||||
SUMMARY: NESTED | FIELD | CONSTR | METHOD | DETAIL: FIELD | CONSTR | METHOD |
java.lang.Objectorg.h2.constant.SysProperties
public class SysProperties
The constants defined in this class are initialized from system properties. Some system properties are per machine settings, and others are as a last resort and temporary solution to work around a problem in the application or database engine. Also, there are system properties to enable features that are not yet fully tested or that are not backward compatible.
System properties can be set when starting the virtual machine:
java -Dh2.baseDir=/tempThey can be set within the application, but this must be done before loading any classes of this database (before loading the JDBC driver):
System.setProperty("h2.baseDir", "/temp");
Field Summary | |
---|---|
static boolean |
ALLOW_BIG_DECIMAL_EXTENSIONS
System property h2.allowBigDecimalExtensions (default:
false).When enabled, classes that extend BigDecimal are supported in PreparedStatement.setBigDecimal. |
static java.lang.String |
ALLOWED_CLASSES
System property h2.allowedClasses (default: *).Comma separated list of class names or prefixes. |
static java.lang.String |
BIND_ADDRESS
System property h2.bindAddress (default: null).Comma separated list of class names or prefixes. |
static java.lang.String |
BROWSER
System property h2.browser (default: null).The preferred browser to use. |
static boolean |
CHECK
System property h2.check (default: true).Assertions in the database engine. |
static boolean |
CHECK2
System property h2.check2 (default: true).Additional assertions in the database engine. |
static java.lang.String |
CLIENT_TRACE_DIRECTORY
System property h2.clientTraceDirectory (default:
trace.db/).Directory where the trace files of the JDBC client are stored (only for client / server). |
static int |
COLLATOR_CACHE_SIZE
System property h2.collatorCacheSize (default: 32000).The cache size for collation keys (in elements). |
static boolean |
CONSOLE_STREAM
System property h2.consoleStream (default: true).H2 Console: stream query results. |
static int |
DATASOURCE_TRACE_LEVEL
System property h2.dataSourceTraceLevel (default: 1).The trace level of the data source implementation. |
static int |
DELAY_WRONG_PASSWORD_MAX
System property h2.delayWrongPasswordMax (default: 4000).The maximum delay in milliseconds before an exception is thrown for using the wrong user name or password. |
static int |
DELAY_WRONG_PASSWORD_MIN
System property h2.delayWrongPasswordMin (default: 250).The minimum delay in milliseconds before an exception is thrown for using the wrong user name or password. |
static boolean |
EMPTY_PASSWORD
System property h2.emptyPassword (default: true).Don't use a secure hash if the user name and password are empty or not set. |
static boolean |
ENABLE_ANONYMOUS_SSL
System property h2.enableAnonymousSSL (default: true).When using SSL connection, the anonymous cipher suite SSL_DH_anon_WITH_RC4_128_MD5 should be enabled. |
static java.lang.String |
FILE_ENCODING
System property file.encoding (default: Cp1252).It is usually set by the system and is the default encoding used for the RunScript and CSV tool. |
static java.lang.String |
FILE_SEPARATOR
System property file.separator (default: /).It is usually set by the system, and used to build absolute file names. |
static java.lang.String |
H2_SCRIPT_DIRECTORY
INTERNAL |
static java.lang.String |
JAVA_SPECIFICATION_VERSION
System property java.specification.version .It is set by the system. |
static java.lang.String |
LINE_SEPARATOR
System property line.separator (default: \n).It is usually set by the system, and used by the script and trace tools. |
static int |
LOB_CLIENT_MAX_SIZE_MEMORY
System property h2.lobClientMaxSizeMemory (default: 65536).The maximum size of a LOB object to keep in memory on the client side when using the server mode. |
static int |
LOB_FILES_PER_DIRECTORY
System property h2.lobFilesPerDirectory (default: 256).Maximum number of LOB files per directory. |
static boolean |
LOB_IN_DATABASE
System property h2.lobInDatabase (default: false).Store LOB files in the database. |
static boolean |
lobCloseBetweenReads
System property h2.lobCloseBetweenReads (default: false).Close LOB files between read operations. |
static boolean |
LOG_ALL_ERRORS
System property h2.logAllErrors (default: false).Write stack traces of any kind of error to a file. |
static java.lang.String |
LOG_ALL_ERRORS_FILE
System property h2.logAllErrorsFile (default:
h2errors.txt).File name to log errors. |
static int |
MAX_FILE_RETRY
System property h2.maxFileRetry (default: 16).Number of times to retry file delete and rename. |
static int |
MAX_RECONNECT
System property h2.maxReconnect (default: 3).The maximum number of tries to reconnect in a row. |
static long |
MAX_TRACE_DATA_LENGTH
System property h2.maxTraceDataLength (default: 65535).The maximum size of a LOB value that is written as data to the trace system. |
static int |
MIN_COLUMN_NAME_MAP
System property h2.minColumnNameMap (default: 3).The minimum number of columns where a hash table is created when result set methods with column name (instead of column index) parameter are called. |
static boolean |
NIO_CLEANER_HACK
System property h2.nioCleanerHack (default: false).If enabled, use the reflection hack to un-map the mapped file if possible. |
static boolean |
NIO_LOAD_MAPPED
System property h2.nioLoadMapped (default: false).If the mapped buffer should be loaded when the file is opened. |
static boolean |
OBJECT_CACHE
System property h2.objectCache (default: true).Cache commonly used values (numbers, strings). |
static int |
OBJECT_CACHE_MAX_PER_ELEMENT_SIZE
System property h2.objectCacheMaxPerElementSize (default:
4096).The maximum size (precision) of an object in the cache. |
static int |
OBJECT_CACHE_SIZE
System property h2.objectCacheSize (default: 1024).The maximum number of objects in the cache. |
static java.lang.String |
PG_DEFAULT_CLIENT_ENCODING
System property h2.pgClientEncoding (default: UTF-8).Default client encoding for PG server. |
static java.lang.String |
PREFIX_TEMP_FILE
System property h2.prefixTempFile (default: h2.temp).The prefix for temporary files in the temp directory. |
static boolean |
RETURN_LOB_OBJECTS
System property h2.returnLobObjects (default: true).When true, ResultSet.getObject for CLOB or BLOB will return a java.sql.Clob / java.sql.Blob object. |
static boolean |
runFinalize
System property h2.runFinalize (default: true).Run finalizers to detect unclosed connections. |
static int |
SERVER_CACHED_OBJECTS
System property h2.serverCachedObjects (default: 64).TCP Server: number of cached objects per session. |
static int |
SERVER_RESULT_SET_FETCH_SIZE
System property h2.serverResultSetFetchSize
(default: 100).The default result set fetch size when using the server mode. |
static int |
SOCKET_CONNECT_RETRY
System property h2.socketConnectRetry (default: 16).The number of times to retry opening a socket. |
static int |
SOCKET_CONNECT_TIMEOUT
System property h2.socketConnectTimeout (default: 2000).The timeout in milliseconds to connect to a server. |
static boolean |
SORT_NULLS_HIGH
System property h2.sortNullsHigh (default: false).Invert the default sorting behavior for NULL, such that NULL is at the end of a result set in an ascending sort and at the beginning of a result set in a descending sort. |
static long |
SPLIT_FILE_SIZE_SHIFT
System property h2.splitFileSizeShift (default: 30).The maximum file size of a split file is 1L << x. |
static java.lang.String |
SYNC_METHOD
System property h2.syncMethod (default: sync).What method to call when closing the database, on checkpoint, and on CHECKPOINT SYNC. |
static boolean |
TRACE_IO
System property h2.traceIO (default: false).Trace all I/O operations. |
static java.lang.String |
USER_HOME
System property user.home (empty string if not set).It is usually set by the system, and used as a replacement for ~ in file names. |
static int |
WEB_MAX_VALUE_LENGTH
System property h2.webMaxValueLength (default: 100000).The H2 Console will abbreviate (truncate) result values larger than this size. |
Method Summary | |
---|---|
static java.lang.String |
getBaseDir()
INTERNAL |
static int |
getIntSetting(java.lang.String name,
int defaultValue)
INTERNAL |
static java.lang.String |
getScriptDirectory()
System property h2.scriptDirectory (default: empty
string).Relative or absolute directory where the script files are stored to or read from. |
static java.lang.String |
getStringSetting(java.lang.String name,
java.lang.String defaultValue)
INTERNAL |
static void |
setBaseDir(java.lang.String dir)
INTERNAL |
Methods inherited from class java.lang.Object |
---|
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Field Detail |
---|
public static final java.lang.String H2_SCRIPT_DIRECTORY
public static final java.lang.String FILE_ENCODING
file.encoding
(default: Cp1252).
public static final java.lang.String FILE_SEPARATOR
file.separator
(default: /).
public static final java.lang.String JAVA_SPECIFICATION_VERSION
java.specification.version
.
public static final java.lang.String LINE_SEPARATOR
line.separator
(default: \n).
public static final java.lang.String USER_HOME
user.home
(empty string if not set).
public static final boolean ALLOW_BIG_DECIMAL_EXTENSIONS
h2.allowBigDecimalExtensions
(default:
false).
public static final java.lang.String ALLOWED_CLASSES
h2.allowedClasses
(default: *).
public static final java.lang.String BROWSER
h2.browser
(default: null).java -Dh2.browser="open,-a,Safari,%url" ...
.
public static final boolean ENABLE_ANONYMOUS_SSL
h2.enableAnonymousSSL
(default: true).
public static final java.lang.String BIND_ADDRESS
h2.bindAddress
(default: null).
public static final boolean CHECK
h2.check
(default: true).
public static final boolean CHECK2
h2.check2
(default: true).
public static final java.lang.String CLIENT_TRACE_DIRECTORY
h2.clientTraceDirectory
(default:
trace.db/).
public static final int COLLATOR_CACHE_SIZE
h2.collatorCacheSize
(default: 32000).
public static final boolean CONSOLE_STREAM
h2.consoleStream
(default: true).
public static final int DATASOURCE_TRACE_LEVEL
h2.dataSourceTraceLevel
(default: 1).
public static final int DELAY_WRONG_PASSWORD_MIN
h2.delayWrongPasswordMin
(default: 250).
public static final int DELAY_WRONG_PASSWORD_MAX
h2.delayWrongPasswordMax
(default: 4000).
public static final boolean EMPTY_PASSWORD
h2.emptyPassword
(default: true).
public static boolean lobCloseBetweenReads
h2.lobCloseBetweenReads
(default: false).
public static final int LOB_FILES_PER_DIRECTORY
h2.lobFilesPerDirectory
(default: 256).
public static final boolean LOB_IN_DATABASE
h2.lobInDatabase
(default: false).
public static final int LOB_CLIENT_MAX_SIZE_MEMORY
h2.lobClientMaxSizeMemory
(default: 65536).
public static final boolean LOG_ALL_ERRORS
h2.logAllErrors
(default: false).
public static final java.lang.String LOG_ALL_ERRORS_FILE
h2.logAllErrorsFile
(default:
h2errors.txt).
public static final int MAX_FILE_RETRY
h2.maxFileRetry
(default: 16).
public static final int MAX_RECONNECT
h2.maxReconnect
(default: 3).
public static final long MAX_TRACE_DATA_LENGTH
h2.maxTraceDataLength
(default: 65535).
public static final int MIN_COLUMN_NAME_MAP
h2.minColumnNameMap
(default: 3).
public static final boolean NIO_LOAD_MAPPED
h2.nioLoadMapped
(default: false).
public static final boolean NIO_CLEANER_HACK
h2.nioCleanerHack
(default: false).
public static final boolean OBJECT_CACHE
h2.objectCache
(default: true).
public static final int OBJECT_CACHE_MAX_PER_ELEMENT_SIZE
h2.objectCacheMaxPerElementSize
(default:
4096).
public static final int OBJECT_CACHE_SIZE
h2.objectCacheSize
(default: 1024).
public static final java.lang.String PG_DEFAULT_CLIENT_ENCODING
h2.pgClientEncoding
(default: UTF-8).
public static final java.lang.String PREFIX_TEMP_FILE
h2.prefixTempFile
(default: h2.temp).
public static final boolean RETURN_LOB_OBJECTS
h2.returnLobObjects
(default: true).
public static boolean runFinalize
h2.runFinalize
(default: true).
public static final int SERVER_CACHED_OBJECTS
h2.serverCachedObjects
(default: 64).
public static final int SERVER_RESULT_SET_FETCH_SIZE
h2.serverResultSetFetchSize
(default: 100).
public static final int SOCKET_CONNECT_RETRY
h2.socketConnectRetry
(default: 16).
public static final int SOCKET_CONNECT_TIMEOUT
h2.socketConnectTimeout
(default: 2000).
public static final boolean SORT_NULLS_HIGH
h2.sortNullsHigh
(default: false).
public static final long SPLIT_FILE_SIZE_SHIFT
h2.splitFileSizeShift
(default: 30).
public static final java.lang.String SYNC_METHOD
h2.syncMethod
(default: sync).
public static final boolean TRACE_IO
h2.traceIO
(default: false).
public static final int WEB_MAX_VALUE_LENGTH
h2.webMaxValueLength
(default: 100000).
Method Detail |
---|
public static java.lang.String getStringSetting(java.lang.String name, java.lang.String defaultValue)
public static int getIntSetting(java.lang.String name, int defaultValue)
public static void setBaseDir(java.lang.String dir)
public static java.lang.String getBaseDir()
public static java.lang.String getScriptDirectory()
h2.scriptDirectory
(default: empty
string).
|
||||||||||
PREV CLASS NEXT CLASS | FRAMES NO FRAMES | |||||||||
SUMMARY: NESTED | FIELD | CONSTR | METHOD | DETAIL: FIELD | CONSTR | METHOD |