com.tangosol.coherence.dslquery.statement.CreateCacheStatementBuilder Maven / Gradle / Ivy
/*
* Copyright (c) 2000, 2020, Oracle and/or its affiliates.
*
* Licensed under the Universal Permissive License v 1.0 as shown at
* http://oss.oracle.com/licenses/upl.
*/
package com.tangosol.coherence.dslquery.statement;
import com.tangosol.coherence.dslquery.CohQLException;
import com.tangosol.coherence.dslquery.ExecutionContext;
import com.tangosol.coherence.dslquery.StatementResult;
import com.tangosol.coherence.dsltools.termtrees.NodeTerm;
import com.tangosol.config.expression.ParameterResolver;
import java.io.PrintWriter;
import java.util.List;
import static com.tangosol.net.cache.TypeAssertion.withoutTypeChecking;
/**
* An implementation of a {@link com.tangosol.coherence.dslquery.StatementBuilder}
* that parses a CohQL term tree to produce an instance of a {@link CreateCacheStatement}.
*
* @author jk 2013.12.11
* @since Coherence 12.2.1
*/
public class CreateCacheStatementBuilder
extends AbstractStatementBuilder
{
// ----- StatementBuilder interface -------------------------------------
@Override
public CreateCacheStatement realize(ExecutionContext ctx, NodeTerm term, List listBindVars,
ParameterResolver namedBindVars)
{
String sCacheName = getCacheName(term);
if (sCacheName == null || sCacheName.isEmpty())
{
throw new CohQLException("Cache name needed for create cache");
}
return new CreateCacheStatement(sCacheName);
}
@Override
public String getSyntax()
{
return "(ENSURE | CREATE) CACHE 'cache-name'";
}
@Override
public String getDescription()
{
return "Make sure the NamedCache 'cache-name' exists.";
}
// ----- inner class: CreateCacheStatement ------------------------------
/**
* Implementation of the CohQL "CREATE CACHE" command.
*/
public static class CreateCacheStatement
extends AbstractStatement
{
// ----- constructors -----------------------------------------------
/**
* Construct a CreateCacheStatement that will create a cache
* with the specified name.
*
* @param sCache the name of the cache to create
*/
public CreateCacheStatement(String sCache)
{
f_sCache = sCache;
}
// ----- Statement interface ----------------------------------------
@Override
public StatementResult execute(ExecutionContext ctx)
{
ctx.getCacheFactory().ensureTypedCache(f_sCache, null, withoutTypeChecking());
return StatementResult.NULL_RESULT;
}
@Override
public void showPlan(PrintWriter out)
{
out.printf("CacheFactory.getCache(\"%s\"))", f_sCache);
}
// ----- data members -----------------------------------------------
/**
* The name of the cache to be created by this command.
*/
protected final String f_sCache;
}
// ----- constants ------------------------------------------------------
/**
* An instance of CreateCacheStatementBuilder.
*/
public static final CreateCacheStatementBuilder INSTANCE = new CreateCacheStatementBuilder();
}