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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.

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/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * 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
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.cassandra.audit;

import java.io.Serializable;
import java.util.HashMap;
import java.util.Map;

import org.apache.cassandra.diag.DiagnosticEvent;
import org.apache.cassandra.diag.DiagnosticEventService;

/**
 * {@Link AuditLogEntry} wrapper to expose audit events as {@link DiagnosticEvent}s.
 */
public final class AuditEvent extends DiagnosticEvent
{
    private final AuditLogEntry entry;

    private AuditEvent(AuditLogEntry entry)
    {
        this.entry = entry;
    }

    static void create(AuditLogEntry entry)
    {
        if (isEnabled(entry.getType()))
            DiagnosticEventService.instance().publish(new AuditEvent(entry));
    }

    private static boolean isEnabled(AuditLogEntryType type)
    {
        return DiagnosticEventService.instance().isEnabled(AuditEvent.class, type);
    }

    public Enum getType()
    {
        return entry.getType();
    }

    public String getSource()
    {
        return entry.getSource().toString(true);
    }

    public AuditLogEntry getEntry()
    {
        return entry;
    }

    public Map toMap()
    {
        HashMap ret = new HashMap<>();
        if (entry.getKeyspace() != null) ret.put("keyspace", entry.getKeyspace());
        if (entry.getOperation() != null) ret.put("operation", entry.getOperation());
        if (entry.getScope() != null) ret.put("scope", entry.getScope());
        if (entry.getUser() != null) ret.put("user", entry.getUser());
        return ret;
    }
}