Java Doc for PageManager.java in  » Database-DBMS » JDBM » jdbm » recman » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Database DBMS » JDBM » jdbm.recman   Source Cross Reference   Class Diagram   Java Document (Java Doc)   java.lang.Object    jdbm.recman.PageManager PageManager final class PageManager (Code) This class manages the linked lists of pages that make up a file. Constructor Summary   PageManager(RecordFile file)      Creates a new page manager using the indicated record file. Method Summary  long allocate(short type)      Allocates a page of the indicated type.  void close()      Closes the page manager.  void commit()      Commit all pending (in-memory) data by flushing the page manager.  void free(short type, long recid)      Frees a page of the indicated type.  FileHeader getFileHeader()      Returns the file header.  long getFirst(short type)      Returns the first page on the indicated list.  long getLast(short type)      Returns the last page on the indicated list.  long getNext(long block)       long getPrev(long block)       void rollback()      Flushes the page manager. Constructor Detail PageManager PageManager(RecordFile file) throws IOException(Code) Creates a new page manager using the indicated record file. Method Detail allocate long allocate(short type) throws IOException(Code) Allocates a page of the indicated type. Returns recid of the page. close void close() throws IOException(Code) Closes the page manager. This flushes the page manager and releases the lock on the header. commit void commit() throws IOException(Code) Commit all pending (in-memory) data by flushing the page manager. This forces a flush of all outstanding blocks (this it's an implicit RecordFile.commit as well). free void free(short type, long recid) throws IOException(Code) Frees a page of the indicated type. getFileHeader FileHeader getFileHeader()(Code) Returns the file header. getFirst long getFirst(short type) throws IOException(Code) Returns the first page on the indicated list. getLast long getLast(short type) throws IOException(Code) Returns the last page on the indicated list. getNext long getNext(long block) throws IOException(Code) Returns the page following the indicated block getPrev long getPrev(long block) throws IOException(Code) Returns the page before the indicated block rollback void rollback() throws IOException(Code) Flushes the page manager. This forces a flush of all outstanding blocks (this it's an implicit RecordFile.commit as well). Methods inherited from java.lang.Object native protected Object clone() throws CloneNotSupportedException(Code)(Java Doc) public boolean equals(Object obj)(Code)(Java Doc) protected void finalize() throws Throwable(Code)(Java Doc) final native public Class getClass()(Code)(Java Doc) native public int hashCode()(Code)(Java Doc) final native public void notify()(Code)(Java Doc) final native public void notifyAll()(Code)(Java Doc) public String toString()(Code)(Java Doc) final native public void wait(long timeout) throws InterruptedException(Code)(Java Doc) final public void wait(long timeout, int nanos) throws InterruptedException(Code)(Java Doc) final public void wait() throws InterruptedException(Code)(Java Doc)