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The Apache Cassandra Project develops a highly scalable second-generation distributed database, bringing together Dynamo's fully distributed design and Bigtable's ColumnFamily-based data model.
/*
* Licensed to the Apache Software Foundation (ASF) under one
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* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
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package org.apache.cassandra.cql3.statements;
import java.util.List;
import com.google.common.collect.ImmutableList;
import org.apache.cassandra.auth.*;
import org.apache.cassandra.config.DatabaseDescriptor;
import org.apache.cassandra.config.SchemaConstants;
import org.apache.cassandra.cql3.ColumnIdentifier;
import org.apache.cassandra.cql3.ColumnSpecification;
import org.apache.cassandra.cql3.ResultSet;
import org.apache.cassandra.db.marshal.BooleanType;
import org.apache.cassandra.db.marshal.UTF8Type;
import org.apache.cassandra.transport.messages.ResultMessage;
public class ListUsersStatement extends ListRolesStatement
{
// pseudo-virtual cf as the actual datasource is dependent on the IRoleManager impl
private static final String KS = SchemaConstants.AUTH_KEYSPACE_NAME;
private static final String CF = "users";
private static final List metadata =
ImmutableList.of(new ColumnSpecification(KS, CF, new ColumnIdentifier("name", true), UTF8Type.instance),
new ColumnSpecification(KS, CF, new ColumnIdentifier("super", true), BooleanType.instance));
@Override
protected ResultMessage formatResults(List sortedRoles)
{
ResultSet result = new ResultSet(metadata);
IRoleManager roleManager = DatabaseDescriptor.getRoleManager();
for (RoleResource role : sortedRoles)
{
if (!roleManager.canLogin(role))
continue;
result.addColumnValue(UTF8Type.instance.decompose(role.getRoleName()));
result.addColumnValue(BooleanType.instance.decompose(Roles.hasSuperuserStatus(role)));
}
return new ResultMessage.Rows(result);
}
}