org.apache.hadoop.hbase.client

Class Query

java.lang.Object

org.apache.hadoop.hbase.client.Operation

org.apache.hadoop.hbase.client.OperationWithAttributes

org.apache.hadoop.hbase.client.Query

All Implemented Interfaces:

Attributes

Direct Known Subclasses:

Get, Scan

@InterfaceAudience.Public
@InterfaceStability.Evolving
public abstract class Query
extends OperationWithAttributes

Field Summary

Fields

Modifier and Type	Field and Description
protected Filter	filter

Fields inherited from class org.apache.hadoop.hbase.client.OperationWithAttributes

ID_ATRIBUTE

Constructor Summary

Constructors

Constructor and Description
Query()

Method Summary

Methods

Modifier and Type	Method and Description
byte[]	getACL()
boolean	getACLStrategy() Deprecated. No effect
Authorizations	getAuthorizations()
Filter	getFilter()
IsolationLevel	getIsolationLevel()
void	setACL(Map<String,Permission> perms)
void	setACL(String user, Permission perms)
void	setACLStrategy(boolean cellFirstStrategy) Deprecated. No effect
void	setAuthorizations(Authorizations authorizations) Sets the authorizations to be used by this Query
Query	setFilter(Filter filter) Apply the specified server-side filter when performing the Query.
void	setIsolationLevel(IsolationLevel level) Set the isolation level for this query.

Methods inherited from class org.apache.hadoop.hbase.client.OperationWithAttributes

getAttribute, getAttributeSize, getAttributesMap, getId, setAttribute, setId

Methods inherited from class org.apache.hadoop.hbase.client.Operation

getFingerprint, toJSON, toJSON, toMap, toMap, toString, toString

Methods inherited from class java.lang.Object

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

Field Detail

filter

protected Filter filter

Constructor Detail

Query

public Query()

Method Detail

getFilter

public Filter getFilter()

Returns:

Filter

setFilter

public Query setFilter(Filter filter)

Apply the specified server-side filter when performing the Query. Only Filter.filterKeyValue(Cell) is called AFTER all tests for ttl, column match, deletes and max versions have been run.

Parameters:

filter - filter to run on the server

Returns:

this for invocation chaining

setAuthorizations

@InterfaceStability.Unstable
public void setAuthorizations(Authorizations authorizations)

Sets the authorizations to be used by this Query

Parameters:

authorizations -

getAuthorizations

@InterfaceStability.Unstable
public Authorizations getAuthorizations()
                                 throws DeserializationException

Returns:

The authorizations this Query is associated with.

Throws:

DeserializationException

getACL

@InterfaceStability.Unstable
public byte[] getACL()

Returns:

The serialized ACL for this operation, or null if none

setACL

@InterfaceStability.Unstable
public void setACL(String user,
                                      Permission perms)

Parameters:

user - User short name

perms - Permissions for the user

setACL

@InterfaceStability.Unstable
public void setACL(Map<String,Permission> perms)

Parameters:

perms - A map of permissions for a user or users

getACLStrategy

@Deprecated
public boolean getACLStrategy()

Deprecated. No effect

setACLStrategy

@Deprecated
public void setACLStrategy(boolean cellFirstStrategy)

Deprecated. No effect

setIsolationLevel

public void setIsolationLevel(IsolationLevel level)

Set the isolation level for this query. If the isolation level is set to READ_UNCOMMITTED, then this query will return data from committed and uncommitted transactions. If the isolation level is set to READ_COMMITTED, then this query will return data from committed transactions only. If a isolation level is not explicitly set on a Query, then it is assumed to be READ_COMMITTED.

Parameters:

level - IsolationLevel for this query

getIsolationLevel

public IsolationLevel getIsolationLevel()

Returns:

The isolation level of this scan. If no isolation level was set for this scan object, then it returns READ_COMMITTED.