nifi-mock/src/main/java/org/apache/nifi/util/CapturingLogger.java

package org.apache.nifi.util;

import org.slf4j.Logger;
import org.slf4j.Marker;
import org.slf4j.helpers.MessageFormatter;

import java.util.ArrayList;
import java.util.Collections;
import java.util.List;

/*
 * 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.
 */
/**
 * Implementation of SLF4J logger that records every log message and provides a mechanism
 * to retrieve them.
 *
 */
public class CapturingLogger implements Logger {

    private final Logger logger;

    private final List<LogMessage> traceMessages = Collections.synchronizedList(new ArrayList<>());
    private final List<LogMessage> debugMessages = Collections.synchronizedList(new ArrayList<>());
    private final List<LogMessage> infoMessages = Collections.synchronizedList(new ArrayList<>());
    private final List<LogMessage> warnMessages = Collections.synchronizedList(new ArrayList<>());
    private final List<LogMessage> errorMessages = Collections.synchronizedList(new ArrayList<>());

    public CapturingLogger(final Logger logger) {
        this.logger = logger;
    }
    public List<LogMessage> getTraceMessages() {
        return Collections.unmodifiableList(traceMessages);
    }
    public List<LogMessage> getDebugMessages() {
        return Collections.unmodifiableList(debugMessages);
    }
    public List<LogMessage> getInfoMessages() {
        return Collections.unmodifiableList(infoMessages);
    }
    public List<LogMessage> getWarnMessages() {
        return Collections.unmodifiableList(warnMessages);
    }
    public List<LogMessage> getErrorMessages() {
        return Collections.unmodifiableList(errorMessages);
    }

    @Override
    public String getName() {
        return logger.getName();
    }

    @Override
    public boolean isTraceEnabled() {
        return logger.isTraceEnabled();
    }

    @Override
    public void trace(String msg) {
        traceMessages.add(new LogMessage(null, msg, null));
        logger.trace(msg);
    }

    @Override
    public void trace(String format, Object arg) {
        traceMessages.add(new LogMessage(null, format, null, arg));
        logger.trace(format, arg);
    }

    @Override
    public void trace(String format, Object arg1, Object arg2) {
        traceMessages.add(new LogMessage(null, format, null, arg1, arg2));
        logger.trace(format, arg1, arg2);
    }

    @Override
    public void trace(String format, Object... arguments) {
        traceMessages.add(new LogMessage(null, format, null, arguments));
        logger.trace(format, arguments);
    }

    @Override
    public void trace(String msg, Throwable t) {
        traceMessages.add(new LogMessage(null, msg, t));
        logger.trace(msg, t);
    }

    @Override
    public boolean isTraceEnabled(Marker marker) {
        return logger.isTraceEnabled(marker);
    }

    @Override
    public void trace(Marker marker, String msg) {
        traceMessages.add(new LogMessage(marker, msg, null));
        logger.trace(marker, msg);

    }

    @Override
    public void trace(Marker marker, String format, Object arg) {
        traceMessages.add(new LogMessage(marker, format, null, arg));
        logger.trace(marker, format, arg);

    }

    @Override
    public void trace(Marker marker, String format, Object arg1, Object arg2) {
        traceMessages.add(new LogMessage(marker, format, null, arg1, arg2));
        logger.trace(marker, format, arg1, arg2);
    }

    @Override
    public void trace(Marker marker, String format, Object... argArray) {
        traceMessages.add(new LogMessage(marker, format, null, argArray));
        logger.trace(marker, format, argArray);
    }

    @Override
    public void trace(Marker marker, String msg, Throwable t) {
        traceMessages.add(new LogMessage(marker, msg, t));
        logger.trace(marker, msg, t);
    }

    // DEBUG
    @Override
    public boolean isDebugEnabled() {
        return logger.isDebugEnabled();
    }

    @Override
    public void debug(String msg) {
        debugMessages.add(new LogMessage(null, msg, null));
        logger.debug(msg);
    }

    @Override
    public void debug(String format, Object arg) {
        debugMessages.add(new LogMessage(null, format, null, arg));
        logger.debug(format, arg);
    }

    @Override
    public void debug(String format, Object arg1, Object arg2) {
        debugMessages.add(new LogMessage(null, format, null, arg1, arg2));
        logger.debug(format, arg1, arg2);
    }

    @Override
    public void debug(String format, Object... arguments) {
        debugMessages.add(new LogMessage(null, format, null, arguments));
        logger.debug(format, arguments);
    }

    @Override
    public void debug(String msg, Throwable t) {
        debugMessages.add(new LogMessage(null, msg, t));
        logger.debug(msg, t);
    }

    @Override
    public boolean isDebugEnabled(Marker marker) {
        return logger.isDebugEnabled(marker);
    }

    @Override
    public void debug(Marker marker, String msg) {
        debugMessages.add(new LogMessage(marker, msg, null));
        logger.debug(marker, msg);

    }

    @Override
    public void debug(Marker marker, String format, Object arg) {
        debugMessages.add(new LogMessage(marker, format, null, arg));
        logger.debug(marker, format, arg);

    }

    @Override
    public void debug(Marker marker, String format, Object arg1, Object arg2) {
        debugMessages.add(new LogMessage(marker, format, null, arg1, arg2));
        logger.debug(marker, format, arg1, arg2);
    }

    @Override
    public void debug(Marker marker, String format, Object... argArray) {
        debugMessages.add(new LogMessage(marker, format, null, argArray));
        logger.debug(marker, format, argArray);
    }

    @Override
    public void debug(Marker marker, String msg, Throwable t) {
        debugMessages.add(new LogMessage(marker, msg, t));
        logger.debug(marker, msg, t);
    }

    // INFO
    @Override
    public boolean isInfoEnabled() {
        return logger.isInfoEnabled();
    }

    @Override
    public void info(String msg) {
        this.info(msg, (Object) null);
    }

    @Override
    public void info(String format, Object arg) {
        this.info(format, arg, null);
    }

    @Override
    public void info(String format, Object arg1, Object arg2) {
        this.info(format, new Object[] { arg1, arg2 });
    }

    @Override
    public void info(String format, Object... arguments) {
        String message = MessageFormatter.arrayFormat(format, arguments).getMessage();
        infoMessages.add(new LogMessage(null, message, null, arguments));
        logger.info(format, arguments);
    }

    @Override
    public void info(String msg, Throwable t) {
        infoMessages.add(new LogMessage(null, msg, t));
        logger.info(msg, t);
    }

    @Override
    public boolean isInfoEnabled(Marker marker) {
        return logger.isInfoEnabled(marker);
    }

    @Override
    public void info(Marker marker, String msg) {
        infoMessages.add(new LogMessage(marker, msg, null));
        logger.info(marker, msg);

    }

    @Override
    public void info(Marker marker, String format, Object arg) {
        infoMessages.add(new LogMessage(marker, format, null, arg));
        logger.info(marker, format, arg);

    }

    @Override
    public void info(Marker marker, String format, Object arg1, Object arg2) {
        infoMessages.add(new LogMessage(marker, format, null, arg1, arg2));
        logger.info(marker, format, arg1, arg2);
    }

    @Override
    public void info(Marker marker, String format, Object... argArray) {
        infoMessages.add(new LogMessage(marker, format, null, argArray));
        logger.info(marker, format, argArray);
    }

    @Override
    public void info(Marker marker, String msg, Throwable t) {
        infoMessages.add(new LogMessage(marker, msg, t));
        logger.debug(marker, msg, t);
    }
    // WARN
    @Override
    public boolean isWarnEnabled() {
        return logger.isWarnEnabled();
    }

    @Override
    public void warn(String msg) {
        this.warn(msg, (Object) null);
    }

    @Override
    public void warn(String format, Object arg) {
        this.warn(format, arg, null);
    }

    @Override
    public void warn(String format, Object arg1, Object arg2) {
        this.warn(format, new Object[] { arg1, arg2 });
    }

    @Override
    public void warn(String format, Object... arguments) {
        String message = MessageFormatter.arrayFormat(format, arguments).getMessage();
        warnMessages.add(new LogMessage(null, message, null, arguments));
        logger.warn(format, arguments);
    }

    @Override
    public void warn(String msg, Throwable t) {
        warnMessages.add(new LogMessage(null, msg, t));
        logger.warn(msg, t);
    }

    @Override
    public boolean isWarnEnabled(Marker marker) {
        return logger.isWarnEnabled(marker);
    }

    @Override
    public void warn(Marker marker, String msg) {
        warnMessages.add(new LogMessage(marker, msg, null));
        logger.warn(marker, msg);

    }

    @Override
    public void warn(Marker marker, String format, Object arg) {
        warnMessages.add(new LogMessage(marker, format, null, arg));
        logger.warn(marker, format, arg);

    }

    @Override
    public void warn(Marker marker, String format, Object arg1, Object arg2) {
        warnMessages.add(new LogMessage(marker, format, null, arg1, arg2));
        logger.warn(marker, format, arg1, arg2);
    }

    @Override
    public void warn(Marker marker, String format, Object... argArray) {
        warnMessages.add(new LogMessage(marker, format, null, argArray));
        logger.warn(marker, format, argArray);
    }

    @Override
    public void warn(Marker marker, String msg, Throwable t) {
        warnMessages.add(new LogMessage(marker, msg, t));
        logger.warn(marker, msg, t);
    }
    // ERROR
    @Override
    public boolean isErrorEnabled() {
        return logger.isErrorEnabled();
    }

    @Override
    public void error(String msg) {
        errorMessages.add(new LogMessage(null, msg, null));
        logger.error(msg);
    }

    @Override
    public void error(String format, Object arg) {
        final String message = MessageFormatter.arrayFormat(format, new Object[] {arg}).getMessage();
        errorMessages.add(new LogMessage(null, message, null, arg));
        logger.error(format, arg);
    }

    @Override
    public void error(String format, Object arg1, Object arg2) {
        final String message = MessageFormatter.arrayFormat(format, new Object[] {arg1, arg2}).getMessage();
        errorMessages.add(new LogMessage(null, message, null, arg1, arg2));
        logger.error(format, arg1, arg2);
    }

    public void error(String format, Object arg1, Throwable t) {
        final String message = MessageFormatter.arrayFormat(format, new Object[] {arg1}).getMessage();
        errorMessages.add(new LogMessage(null, message, t, arg1));
        logger.error(format, arg1, t);
    }

    @Override
    public void error(String format, Object... arguments) {
        final String message = MessageFormatter.arrayFormat(format, arguments).getMessage();
        errorMessages.add(new LogMessage(null, message, null, arguments));
        logger.error(format, arguments);
    }

    @Override
    public void error(String msg, Throwable t) {
        errorMessages.add(new LogMessage(null, msg, t));
        logger.error(msg, t);
    }

    @Override
    public boolean isErrorEnabled(Marker marker) {
        return logger.isErrorEnabled(marker);
    }

    @Override
    public void error(Marker marker, String msg) {
        errorMessages.add(new LogMessage(marker, msg, null));
        logger.error(marker, msg);

    }

    @Override
    public void error(Marker marker, String format, Object arg) {
        final String message = MessageFormatter.arrayFormat(format, new Object[] {arg}).getMessage();
        errorMessages.add(new LogMessage(marker, message, null, arg));
        logger.error(marker, format, arg);
    }

    @Override
    public void error(Marker marker, String format, Object arg1, Object arg2) {
        final String message = MessageFormatter.arrayFormat(format, new Object[] {arg1, arg2}).getMessage();
        errorMessages.add(new LogMessage(marker, message, null, arg1, arg2));
        logger.error(marker, format, arg1, arg2);
    }

    @Override
    public void error(Marker marker, String format, Object... argArray) {
        final String message = MessageFormatter.arrayFormat(format, argArray).getMessage();
        errorMessages.add(new LogMessage(marker, message, null, argArray));
        logger.error(marker, format, argArray);
    }

    @Override
    public void error(Marker marker, String msg, Throwable t) {
        errorMessages.add(new LogMessage(marker, msg, t));
        logger.error(marker, msg, t);
    }

}