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// Copyright (C) 2012 The Android Open Source Project
//
// Licensed 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 com.google.gerrit.audit;
import com.google.common.base.Preconditions;
import com.google.gerrit.server.CurrentUser;
import java.util.Collections;
import java.util.List;
public class AuditEvent {
public static final String UNKNOWN_SESSION_ID = "000000000000000000000000000";
private static final Object UNKNOWN_RESULT = "N/A";
public final String sessionId;
public final CurrentUser who;
public final long when;
public final String what;
public final List<?> params;
public final Object result;
public final long timeAtStart;
public final long elapsed;
public final UUID uuid;
public static class UUID {
protected final String uuid;
protected UUID() {
uuid = String.format("audit:%s", java.util.UUID.randomUUID().toString());
}
public UUID(final String n) {
uuid = n;
}
public String get() {
return uuid;
}
@Override
public int hashCode() {
return uuid.hashCode();
}
@Override
public boolean equals(Object obj) {
if (this == obj) {
return true;
}
if (obj == null) {
return false;
}
if (!(obj instanceof UUID)) {
return false;
}
return uuid.equals(((UUID) obj).uuid);
}
}
/**
* Creates a new audit event.
*
* @param sessionId session id the event belongs to
* @param who principal that has generated the event
* @param what object of the event
* @param params parameters of the event
*/
public AuditEvent(String sessionId, CurrentUser who, String what, List<?> params) {
this(sessionId, who, what, System.currentTimeMillis(), params,
UNKNOWN_RESULT);
}
/**
* Creates a new audit event with results
*
* @param sessionId session id the event belongs to
* @param who principal that has generated the event
* @param what object of the event
* @param when time-stamp of when the event started
* @param params parameters of the event
* @param result result of the event
*/
public AuditEvent(String sessionId, CurrentUser who, String what, long when,
List<?> params, Object result) {
Preconditions.checkNotNull(what, "what is a mandatory not null param !");
this.sessionId = getValueWithDefault(sessionId, UNKNOWN_SESSION_ID);
this.who = who;
this.what = what;
this.when = when;
this.timeAtStart = this.when;
this.params = getValueWithDefault(params, Collections.emptyList());
this.uuid = new UUID();
this.result = result;
this.elapsed = System.currentTimeMillis() - timeAtStart;
}
private <T> T getValueWithDefault(T value, T defaultValueIfNull) {
if (value == null) {
return defaultValueIfNull;
} else {
return value;
}
}
@Override
public int hashCode() {
return uuid.hashCode();
}
@Override
public boolean equals(Object obj) {
if (this == obj) return true;
if (obj == null) return false;
if (getClass() != obj.getClass()) return false;
AuditEvent other = (AuditEvent) obj;
return this.uuid.equals(other.uuid);
}
@Override
public String toString() {
StringBuilder sb = new StringBuilder();
sb.append(uuid.toString());
sb.append("|");
sb.append(sessionId);
sb.append('|');
sb.append(who);
sb.append('|');
sb.append(when);
sb.append('|');
sb.append(what);
sb.append('|');
sb.append(elapsed);
sb.append('|');
if (params != null) {
sb.append('[');
for (int i = 0; i < params.size(); i++) {
if (i > 0) sb.append(',');
Object param = params.get(i);
if (param == null) {
sb.append("null");
} else {
sb.append(param);
}
}
sb.append(']');
}
sb.append('|');
if (result != null) {
sb.append(result);
}
return sb.toString();
}
}
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