org.jredis

Interface Query

All Known Subinterfaces:

SemanticSort<T>, Sort

All Known Implementing Classes:

SortSupport

public interface Query

Provides for specifying and chaining query predicates. The results of the query directive are returned as an ordered List of byte[] values.

Specific Query types are obtained from the JRedis api. Extensions of this interface allow for the definition of natural expression of the query clauses. Such interfaces should only define methods for the optional elements of the specific query type. Redis interface itself will also only allow for obtaining a reference to such an interface by specifying the required arguments in the associated method signature.

For example, to get a Sort instance, JRedis api specifies the required argument, (namely the the key) in the method signature for JRedis#sort(String), and all the optional elements of the SORT command are provided for in the Sort interface:

 Sort    sort = redis.sort (key)
 List  results = BY("foo*").LIMIT(1, 11).GET("*woof*").DESC().exec();
 for(byte[] item : results) {
     // do something with item ..
  }
 
 

Since:

alpha.0

Version:

alpha.0, 04/02/09

See Also:

Sort

Nested Class Summary

Nested Classes

Modifier and Type	Interface and Description
static class	Query.Support

Method Summary

Modifier and Type	Method and Description
java.util.List<byte[]>	exec() Executes the query.
java.util.concurrent.Future<java.util.List<byte[]>>	execAsync()

Method Detail

exec

java.util.List<byte[]> exec()
                     throws java.lang.IllegalStateException,
                            RedisException

Executes the query.

Returns:

the resultant value list from redis.

Throws:

java.lang.IllegalStateException

RedisException

execAsync

java.util.concurrent.Future<java.util.List<byte[]>> execAsync()