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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.kafka.tools;
import joptsimple.OptionParser;
import org.apache.kafka.common.Metric;
import org.apache.kafka.common.MetricName;
import org.apache.kafka.common.utils.Utils;
import org.apache.kafka.server.util.CommandLineUtils;
import java.io.PrintStream;
import java.util.Arrays;
import java.util.HashSet;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.TreeMap;
import java.util.stream.Collectors;
public class ToolsUtils {
/**
* print out the metrics in alphabetical order
* @param metrics the metrics to be printed out
*/
public static void printMetrics(Map metrics) {
if (metrics != null && !metrics.isEmpty()) {
int maxLengthOfDisplayName = 0;
TreeMap sortedMetrics = new TreeMap<>();
for (Metric metric : metrics.values()) {
MetricName mName = metric.metricName();
String mergedName = mName.group() + ":" + mName.name() + ":" + mName.tags();
maxLengthOfDisplayName = maxLengthOfDisplayName < mergedName.length() ? mergedName.length() : maxLengthOfDisplayName;
sortedMetrics.put(mergedName, metric.metricValue());
}
String doubleOutputFormat = "%-" + maxLengthOfDisplayName + "s : %.3f";
String defaultOutputFormat = "%-" + maxLengthOfDisplayName + "s : %s";
System.out.println(String.format("\n%-" + maxLengthOfDisplayName + "s %s", "Metric Name", "Value"));
for (Map.Entry entry : sortedMetrics.entrySet()) {
String outputFormat;
if (entry.getValue() instanceof Double)
outputFormat = doubleOutputFormat;
else
outputFormat = defaultOutputFormat;
System.out.println(String.format(outputFormat, entry.getKey(), entry.getValue()));
}
}
}
private static void appendColumnValue(
StringBuilder rowBuilder,
String value,
int length
) {
int padLength = length - value.length();
rowBuilder.append(value);
for (int i = 0; i < padLength; i++)
rowBuilder.append(' ');
}
private static void printRow(
List columnLengths,
List row,
PrintStream out
) {
StringBuilder rowBuilder = new StringBuilder();
for (int i = 0; i < row.size(); i++) {
Integer columnLength = columnLengths.get(i);
String columnValue = row.get(i);
appendColumnValue(rowBuilder, columnValue, columnLength);
rowBuilder.append('\t');
}
out.println(rowBuilder);
}
public static void prettyPrintTable(
List headers,
List> rows,
PrintStream out
) {
List columnLengths = headers.stream()
.map(String::length)
.collect(Collectors.toList());
for (List row : rows) {
for (int i = 0; i < headers.size(); i++) {
columnLengths.set(i, Math.max(columnLengths.get(i), row.get(i).length()));
}
}
printRow(columnLengths, headers, out);
rows.forEach(row -> printRow(columnLengths, row, out));
}
public static void validateBootstrapServer(String hostPort) throws IllegalArgumentException {
if (hostPort == null || hostPort.trim().isEmpty()) {
throw new IllegalArgumentException("Error while validating the bootstrap address\n");
}
String[] hostPorts;
if (hostPort.contains(",")) {
hostPorts = hostPort.split(",");
} else {
hostPorts = new String[] {hostPort};
}
String[] validHostPort = Arrays.stream(hostPorts)
.filter(hostPortData -> Utils.getPort(hostPortData) != null)
.toArray(String[]::new);
if (validHostPort.length == 0 || validHostPort.length != hostPorts.length) {
throw new IllegalArgumentException("Please provide valid host:port like host1:9091,host2:9092\n");
}
}
/**
* Return all duplicates in a list. A duplicated element will appear only once.
*/
public static Set duplicates(List s) {
Set set = new HashSet<>();
Set duplicates = new HashSet<>();
s.forEach(element -> {
if (!set.add(element)) {
duplicates.add(element);
}
});
return duplicates;
}
/**
* @param set Source set.
* @param toRemove Elements to remove.
* @return {@code set} copy without {@code toRemove} elements.
* @param Element type.
*/
@SuppressWarnings("unchecked")
public static Set minus(Set set, T...toRemove) {
Set res = new HashSet<>(set);
for (T t : toRemove)
res.remove(t);
return res;
}
/**
* This is a simple wrapper around `CommandLineUtils.printUsageAndExit`.
* It is needed for tools migration (KAFKA-14525), as there is no Java equivalent for return type `Nothing`.
* Can be removed once [[kafka.tools.ConsoleConsumer]]
* and [[kafka.tools.ConsoleProducer]] are migrated.
*
* @param parser Command line options parser.
* @param message Error message.
*/
public static void printUsageAndExit(OptionParser parser, String message) {
CommandLineUtils.printUsageAndExit(parser, message);
throw new AssertionError("printUsageAndExit should not return, but it did.");
}
}
