Class Checkpoint.Writer

java.lang.Object

com.quantfinlib.persist.Checkpoint.Writer

All Implemented Interfaces:

Closeable, AutoCloseable

Enclosing class:

Checkpoint

public static final class Checkpoint.Writer
extends Object
implements Closeable

Collects named sections and commits them atomically on close.

Method Summary

Modifier and Type	Method	Description
void	close()	Commits: temp file beside the target, then atomic rename over it (plain replace on filesystems without atomic rename — see the class javadoc's durability caveat).
Checkpoint.Writer	section(String name, Checkpoint.StateWriter body)	Serializes one model's state under name.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Details

section

public Checkpoint.Writer section(String name,
 Checkpoint.StateWriter body)
                          throws IOException

Serializes one model's state under name. A duplicate name or a throwing body marks the writer failed: close() then commits nothing, so a half-written model can never replace a good file.

Throws:

IOException

close

public void close()
           throws IOException

Commits: temp file beside the target, then atomic rename over it (plain replace on filesystems without atomic rename — see the class javadoc's durability caveat).

Specified by:

close in interface AutoCloseable

Specified by:

close in interface Closeable

Throws:

IOException