| /* |
| * 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.camel.commands; |
| |
| import java.io.PrintStream; |
| import java.util.Hashtable; |
| import java.util.List; |
| import java.util.Map; |
| |
| /** |
| * Command to list all {@link org.apache.camel.CamelContext} in the JVM. |
| */ |
| public class ContextListCommand extends AbstractCamelCommand { |
| |
| private static final String CONTEXT_COLUMN_LABEL = "Context"; |
| private static final String STATUS_COLUMN_LABEL = "Status"; |
| private static final String TOTAL_COLUMN_LABEL = "Total #"; |
| private static final String FAILED_COLUMN_LABEL = "Failed #"; |
| private static final String INFLIGHT_COLUMN_LABEL = "Inflight #"; |
| private static final String UPTIME_COLUMN_LABEL = "Uptime"; |
| private static final int DEFAULT_FORMAT_BUFFER_LENGTH = 24; |
| private static final String DEFAULT_FIELD_PREAMBLE = " "; |
| private static final String DEFAULT_FIELD_POSTAMBLE = " "; |
| private static final String DEFAULT_HEADER_PREAMBLE = " "; |
| private static final String DEFAULT_HEADER_POSTAMBLE = " "; |
| private static final int DEFAULT_COLUMN_WIDTH_INCREMENT = 0; |
| private static final int MAX_COLUMN_WIDTH = Integer.MAX_VALUE; |
| private static final int MIN_COLUMN_WIDTH = 12; |
| |
| @Override |
| public Object execute(CamelController camelController, PrintStream out, PrintStream err) throws Exception { |
| final List<Map<String, String>> camelContexts = camelController.getCamelContexts(); |
| |
| final Map<String, Integer> columnWidths = computeColumnWidths(camelContexts); |
| final String headerFormat = buildFormatString(columnWidths, true); |
| final String rowFormat = buildFormatString(columnWidths, false); |
| |
| if (camelContexts.size() > 0) { |
| out.println(String.format(headerFormat, CONTEXT_COLUMN_LABEL, STATUS_COLUMN_LABEL, TOTAL_COLUMN_LABEL, FAILED_COLUMN_LABEL, INFLIGHT_COLUMN_LABEL, UPTIME_COLUMN_LABEL)); |
| out.println(String.format(headerFormat, "-------", "------", "-------", "--------", "----------", "------")); |
| for (Map<String, String> row : camelContexts) { |
| out.println(String.format(rowFormat, row.get("name"), row.get("state"), row.get("exchangesTotal"), |
| row.get("exchangesFailed"), row.get("exchangesInflight"), row.get("uptime"))); |
| } |
| } |
| |
| return null; |
| } |
| |
| private static Map<String, Integer> computeColumnWidths(final Iterable<Map<String, String>> camelContexts) throws Exception { |
| if (camelContexts == null) { |
| throw new IllegalArgumentException("Unable to determine column widths from null Iterable<CamelContext>"); |
| } else { |
| int maxNameLen = 0; |
| int maxStatusLen = 0; |
| int maxTotalLen = 0; |
| int maxFailedLen = 0; |
| int maxInflightLen = 0; |
| int maxUptimeLen = 0; |
| |
| for (Map<String, String> row : camelContexts) { |
| final String name = row.get("name"); |
| maxNameLen = java.lang.Math.max(maxNameLen, name == null ? 0 : name.length()); |
| |
| final String status = row.get("state"); |
| maxStatusLen = java.lang.Math.max(maxStatusLen, status == null ? 0 : status.length()); |
| |
| final String total = row.get("exchangesTotal"); |
| maxTotalLen = java.lang.Math.max(maxTotalLen, total == null ? 0 : total.length()); |
| |
| final String failed = row.get("exchangesFailed"); |
| maxFailedLen = java.lang.Math.max(maxFailedLen, failed == null ? 0 : failed.length()); |
| |
| final String inflight = row.get("exchangesInflight"); |
| maxInflightLen = java.lang.Math.max(maxInflightLen, inflight == null ? 0 : inflight.length()); |
| |
| final String uptime = row.get("uptime"); |
| maxUptimeLen = java.lang.Math.max(maxUptimeLen, uptime == null ? 0 : uptime.length()); |
| } |
| |
| final Map<String, Integer> retval = new Hashtable<>(); |
| retval.put(CONTEXT_COLUMN_LABEL, maxNameLen); |
| retval.put(STATUS_COLUMN_LABEL, maxStatusLen); |
| retval.put(TOTAL_COLUMN_LABEL, maxTotalLen); |
| retval.put(FAILED_COLUMN_LABEL, maxFailedLen); |
| retval.put(INFLIGHT_COLUMN_LABEL, maxInflightLen); |
| retval.put(UPTIME_COLUMN_LABEL, maxUptimeLen); |
| |
| return retval; |
| } |
| } |
| |
| private static String buildFormatString(final Map<String, Integer> columnWidths, final boolean isHeader) { |
| final String fieldPreamble; |
| final String fieldPostamble; |
| final int columnWidthIncrement; |
| |
| if (isHeader) { |
| fieldPreamble = DEFAULT_HEADER_PREAMBLE; |
| fieldPostamble = DEFAULT_HEADER_POSTAMBLE; |
| } else { |
| fieldPreamble = DEFAULT_FIELD_PREAMBLE; |
| fieldPostamble = DEFAULT_FIELD_POSTAMBLE; |
| } |
| columnWidthIncrement = DEFAULT_COLUMN_WIDTH_INCREMENT; |
| |
| int contextLen = java.lang.Math.min(columnWidths.get(CONTEXT_COLUMN_LABEL) + columnWidthIncrement, MAX_COLUMN_WIDTH); |
| int statusLen = java.lang.Math.min(columnWidths.get(STATUS_COLUMN_LABEL) + columnWidthIncrement, MAX_COLUMN_WIDTH); |
| int totalLen = java.lang.Math.min(columnWidths.get(TOTAL_COLUMN_LABEL) + columnWidthIncrement, MAX_COLUMN_WIDTH); |
| int failedlLen = java.lang.Math.min(columnWidths.get(FAILED_COLUMN_LABEL) + columnWidthIncrement, MAX_COLUMN_WIDTH); |
| int inflightLen = java.lang.Math.min(columnWidths.get(INFLIGHT_COLUMN_LABEL) + columnWidthIncrement, MAX_COLUMN_WIDTH); |
| int uptimeLen = java.lang.Math.min(columnWidths.get(UPTIME_COLUMN_LABEL) + columnWidthIncrement, MAX_COLUMN_WIDTH); |
| contextLen = Math.max(MIN_COLUMN_WIDTH, contextLen); |
| statusLen = Math.max(MIN_COLUMN_WIDTH, statusLen); |
| totalLen = Math.max(MIN_COLUMN_WIDTH, totalLen); |
| failedlLen = Math.max(MIN_COLUMN_WIDTH, failedlLen); |
| inflightLen = Math.max(MIN_COLUMN_WIDTH, inflightLen); |
| uptimeLen = Math.max(MIN_COLUMN_WIDTH, uptimeLen); |
| |
| final StringBuilder retval = new StringBuilder(DEFAULT_FORMAT_BUFFER_LENGTH); |
| retval.append(fieldPreamble).append("%-").append(contextLen).append('.').append(contextLen).append('s').append(fieldPostamble).append(' '); |
| retval.append(fieldPreamble).append("%-").append(statusLen).append('.').append(statusLen).append('s').append(fieldPostamble).append(' '); |
| retval.append(fieldPreamble).append("%").append(totalLen).append('.').append(totalLen).append('s').append(fieldPostamble).append(' '); |
| retval.append(fieldPreamble).append("%").append(failedlLen).append('.').append(failedlLen).append('s').append(fieldPostamble).append(' '); |
| retval.append(fieldPreamble).append("%").append(inflightLen).append('.').append(inflightLen).append('s').append(fieldPostamble).append(' '); |
| retval.append(fieldPreamble).append("%-").append(uptimeLen).append('.').append(uptimeLen).append('s').append(fieldPostamble).append(' '); |
| |
| return retval.toString(); |
| } |
| |
| } |