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/*******************************************************************************
* This file is part of OpenNMS(R).
*
* Copyright (C) 2019 The OpenNMS Group, Inc.
* OpenNMS(R) is Copyright (C) 1999-2019 The OpenNMS Group, Inc.
*
* OpenNMS(R) is a registered trademark of The OpenNMS Group, Inc.
*
* OpenNMS(R) is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published
* by the Free Software Foundation, either version 3 of the License,
* or (at your option) any later version.
*
* OpenNMS(R) is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with OpenNMS(R). If not, see:
* http://www.gnu.org/licenses/
*
* For more information contact:
* OpenNMS(R) Licensing
* http://www.opennms.org/
* http://www.opennms.com/
*******************************************************************************/
package org.opennms.integration.api.xml;
import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.List;
import java.util.Properties;
import java.util.StringTokenizer;
import org.opennms.integration.api.v1.config.datacollection.graphs.PrefabGraph;
import org.opennms.integration.api.v1.config.datacollection.graphs.immutables.ImmutablePrefabGraph;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public class GraphPropertiesParser {
public static final String DEFAULT_GRAPH_LIST_KEY = "reports";
private static final Logger LOG = LoggerFactory.getLogger(ClassPathGraphPropertiesLoader.class);
public static List loadPreFabGraphsFromInputStream(InputStream inputStream) throws IOException {
List graphs = new ArrayList<>();
Properties properties = new Properties();
properties.load(inputStream);
String listString = properties.getProperty(DEFAULT_GRAPH_LIST_KEY);
String[] list;
if (listString != null) {
list = parseBundleList(listString);
} else {
// A report-per-file properties file; just use the report.id
// At this stage, if there was no "reports", then there *must* be
// a report.id, otherwise we're pooched
list = new String[1];
list[0] = properties.getProperty("report.id");
if(list[0] == null) {
return graphs;
}
}
for (String name : list) {
try {
PrefabGraph graph = makePrefabGraph(name, properties);
graphs.add(graph);
} catch (IllegalArgumentException e) {
LOG.error("Failed to load report '{}'", name, e);
}
}
return graphs;
}
public static PrefabGraph makePrefabGraph(String name, Properties props) {
ImmutablePrefabGraph.Builder builder = ImmutablePrefabGraph.newBuilder();
String key = name; // Default to the name, for
builder.setName(name);
if (props.getProperty("report.id") != null) {
key = null; // A report-per-file properties file
}
builder.setTitle(getReportProperty(props, key, "name", true));
builder.setCommand(getReportProperty(props, key, "command", true));
String columnString = getReportProperty(props, key, "columns", true);
builder.setColumns(parseBundleList(columnString));
String externalValuesString = getReportProperty(props, key,
"externalValues",
false);
if (externalValuesString != null) {
builder.setExternalValues(parseBundleList(externalValuesString));
}
String propertiesValuesString = getReportProperty(props, key,
"propertiesValues",
false);
if (propertiesValuesString != null) {
builder.setPropertiesValues(parseBundleList(propertiesValuesString));
}
String typesString = getReportProperty(props, key, "type", false);
if (typesString != null) {
builder.setTypes(parseBundleList(typesString));
}
builder.setDescription(getReportProperty(props, key, "description",
false));
/*
* TODO: Right now a "width" and "height" property is required in
* order to get zoom to work properly on non-standard sized graphs. A
* more elegant solution would be to parse the command string and look
* for --width and --height and set the following two variables
* automagically, without having to rely on a configuration file.
*/
builder.setGraphWidth(getIntegerReportProperty(props, key, "width",
false));
builder.setGraphHeight(getIntegerReportProperty(props, key, "height",
false));
String suppressString = getReportProperty(props, key, "suppress",
false);
if (suppressString != null) {
builder.setSupress(parseBundleList(suppressString));
}
return builder.build();
}
// A null key means we are loading from a report-per-file properties file
private static String getReportProperty(Properties props, String key,
String suffix, boolean required) {
String propertyName;
String graphName;
if (key != null) {
propertyName = "report." + key + "." + suffix;
graphName = key;
} else {
propertyName = "report." + suffix;
// It's lightly evil to know this from this method, but we can be
// confident that report.id will exist
graphName = props.getProperty("report.id");
}
String property = props.getProperty(propertyName);
if (property == null && required == true) {
throw new IllegalArgumentException("Properties for "
+ "report '" + graphName + "' must contain \'"
+ propertyName + "\' property");
}
return property;
}
public static Integer getIntegerReportProperty(Properties props, String key,
String suffix, boolean required) {
String value = getReportProperty(props, key, suffix, required);
if (value == null) {
return null;
}
try {
return Integer.valueOf(value);
} catch (NumberFormatException e) {
throw new IllegalArgumentException(
"Property value for '"
+ suffix
+ "' on report '"
+ key
+ "' must be an integer. '"
+ value
+ "' is not a valid value");
}
}
/**
* Parses a string into an array of substrings, using a comma as a delimiter
* and trimming whitespace.
*
* @param list
* The list formatted as a delimeter -delimited
* string.
* @return The list formatted as an array of strings.
*/
public static String[] parseBundleList(String list) {
return parseBundleList(list, ",");
}
/**
* Parses a string into an array of substrings, using the specified
* delimeter and trimming whitespace.
*
* @param list
* The list formatted as a delimeter -delimited
* string.
* @param delimiter
* The delimeter.
* @return The list formatted as an array of strings.
*/
public static String[] parseBundleList(String list, String delimiter) {
if (list == null || delimiter == null) {
throw new IllegalArgumentException("Cannot take null parameters.");
}
String[] strings = new String[0];
StringTokenizer tokenizer = new StringTokenizer(list, delimiter, false);
int stringCount = tokenizer.countTokens();
strings = new String[stringCount];
for (int i = 0; i < stringCount; i++) {
strings[i] = tokenizer.nextToken().trim();
}
return (strings);
}
}
