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/*
* Copyright 2011 James Moger.
*
* 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.iciql.util;
import java.text.DecimalFormat;
import java.util.Set;
import java.util.concurrent.atomic.AtomicLong;
/**
* Utility class to optionally log generated statements to StatementListeners.<br>
* Statement logging is disabled by default.
* <p>
* This class also tracks the counts for generated statements by major type.
*
*/
public class StatementLogger {
/**
* Enumeration of the different statement types that are logged.
*/
public enum StatementType {
STAT, TOTAL, CREATE, INSERT, UPDATE, MERGE, DELETE, SELECT;
}
/**
* Interface that defines a statement listener.
*/
public interface StatementListener {
void logStatement(StatementType type, String statement);
}
private static final Set<StatementListener> LISTENERS = Utils.newHashSet();
private static final StatementListener CONSOLE = new StatementListener() {
@Override
public void logStatement(StatementType type, String message) {
System.out.println(message);
}
};
private static final AtomicLong SELECT_COUNT = new AtomicLong();
private static final AtomicLong CREATE_COUNT = new AtomicLong();
private static final AtomicLong INSERT_COUNT = new AtomicLong();
private static final AtomicLong UPDATE_COUNT = new AtomicLong();
private static final AtomicLong MERGE_COUNT = new AtomicLong();
private static final AtomicLong DELETE_COUNT = new AtomicLong();
/**
* Activates the Console Logger.
*/
public static void activateConsoleLogger() {
LISTENERS.add(CONSOLE);
}
/**
* Deactivates the Console Logger.
*/
public static void deactivateConsoleLogger() {
LISTENERS.remove(CONSOLE);
}
/**
* Registers a listener with the relay.
*
* @param listener
*/
public static void registerListener(StatementListener listener) {
LISTENERS.add(listener);
}
/**
* Unregisters a listener with the relay.
*
* @param listener
*/
public static void unregisterListener(StatementListener listener) {
LISTENERS.remove(listener);
}
public static void create(String statement) {
CREATE_COUNT.incrementAndGet();
logStatement(StatementType.CREATE, statement);
}
public static void insert(String statement) {
INSERT_COUNT.incrementAndGet();
logStatement(StatementType.INSERT, statement);
}
public static void update(String statement) {
UPDATE_COUNT.incrementAndGet();
logStatement(StatementType.UPDATE, statement);
}
public static void merge(String statement) {
MERGE_COUNT.incrementAndGet();
logStatement(StatementType.MERGE, statement);
}
public static void delete(String statement) {
DELETE_COUNT.incrementAndGet();
logStatement(StatementType.DELETE, statement);
}
public static void select(String statement) {
SELECT_COUNT.incrementAndGet();
logStatement(StatementType.SELECT, statement);
}
private static void logStatement(StatementType type, String statement) {
for (StatementListener listener : LISTENERS) {
try {
listener.logStatement(type, statement);
} catch (Throwable t) {
}
}
}
public static long getCreateCount() {
return CREATE_COUNT.longValue();
}
public static long getInsertCount() {
return INSERT_COUNT.longValue();
}
public static long getUpdateCount() {
return UPDATE_COUNT.longValue();
}
public static long getMergeCount() {
return MERGE_COUNT.longValue();
}
public static long getDeleteCount() {
return DELETE_COUNT.longValue();
}
public static long getSelectCount() {
return SELECT_COUNT.longValue();
}
public static long getTotalCount() {
return getCreateCount() + getInsertCount() + getUpdateCount() + getDeleteCount() + getMergeCount()
+ getSelectCount();
}
public static void logStats() {
logStatement(StatementType.STAT, "iciql Runtime Statistics");
logStatement(StatementType.STAT, "========================");
logStat(StatementType.CREATE, getCreateCount());
logStat(StatementType.INSERT, getInsertCount());
logStat(StatementType.UPDATE, getUpdateCount());
logStat(StatementType.MERGE, getMergeCount());
logStat(StatementType.DELETE, getDeleteCount());
logStat(StatementType.SELECT, getSelectCount());
logStatement(StatementType.STAT, "========================");
logStat(StatementType.TOTAL, getTotalCount());
}
private static void logStat(StatementType type, long value) {
if (value > 0) {
DecimalFormat df = new DecimalFormat("###,###,###,###");
logStatement(StatementType.STAT,
StringUtils.pad(type.name(), 6, " ", true) + " = " + df.format(value));
}
}
}
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