org.apache.nutch.db
Class DistributedWebDBWriter.PageInstruction

java.lang.Object
  org.apache.nutch.db.DistributedWebDBWriter.PageInstruction

All Implemented Interfaces:

Comparable, Writable, WritableComparable

Enclosing class:

DistributedWebDBWriter

public static class DistributedWebDBWriter.PageInstruction

extends Object

implements WritableComparable

PageInstruction holds an operation over a Page.

Nested Class Summary

static class	DistributedWebDBWriter.PageInstruction.PageComparator Sorts the instruction first by Page, then by opcode.
static class	DistributedWebDBWriter.PageInstruction.UrlComparator Sorts the instruction first by url, then by opcode.

Constructor Summary

DistributedWebDBWriter.PageInstruction()

DistributedWebDBWriter.PageInstruction(Page page, int opcode)

DistributedWebDBWriter.PageInstruction(Page page, Link link, int opcode)

Method Summary

int	compareTo(Object o)
int	getInstruction()
Link	getLink()
Page	getPage()
void	readFields(DataInput in) Reads the fields of this object from in.
void	set(DistributedWebDBWriter.PageInstruction that) Init from another PageInstruction object.
void	set(Page page, int opcode) Init PageInstruction with no Link
void	set(Page page, Link link, int opcode) Init PageInstruction with a Link
void	write(DataOutput out) Writes the fields of this object to out.

Methods inherited from class java.lang.Object

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

Constructor Detail

DistributedWebDBWriter.PageInstruction

public DistributedWebDBWriter.PageInstruction()

DistributedWebDBWriter.PageInstruction

public DistributedWebDBWriter.PageInstruction(Page page,
                                              int opcode)

DistributedWebDBWriter.PageInstruction

public DistributedWebDBWriter.PageInstruction(Page page,
                                              Link link,
                                              int opcode)

Method Detail

set

public void set(DistributedWebDBWriter.PageInstruction that)

Init from another PageInstruction object.

set

public void set(Page page,
                int opcode)

Init PageInstruction with no Link

set

public void set(Page page,
                Link link,
                int opcode)

Init PageInstruction with a Link

compareTo

public int compareTo(Object o)

Specified by:

compareTo in interface Comparable

write

public void write(DataOutput out)
           throws IOException

Description copied from interface: Writable

Writes the fields of this object to out.

Specified by:

write in interface Writable

Throws:

IOException

readFields

public void readFields(DataInput in)
                throws IOException

Description copied from interface: Writable

Reads the fields of this object from in. For efficiency, implementations should attempt to re-use storage in the existing object where possible.

Specified by:

readFields in interface Writable

Throws:

IOException

getPage

public Page getPage()

getLink

public Link getLink()

getInstruction

public int getInstruction()