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/*-
* ============LICENSE_START=======================================================
* Copyright (C) 2016-2018 Ericsson. All rights reserved.
* Modifications Copyright (C) 2019 Nordix Foundation.
* ================================================================================
* 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.
*
* SPDX-License-Identifier: Apache-2.0
* ============LICENSE_END=========================================================
*/
package org.onap.policy.apex.auth.clieditor;
import java.io.IOException;
import java.util.Arrays;
import java.util.Set;
import java.util.TreeSet;
import org.onap.policy.apex.auth.clieditor.utils.CliUtils;
import org.onap.policy.apex.model.utilities.json.JsonHandler;
import org.slf4j.ext.XLogger;
import org.slf4j.ext.XLoggerFactory;
/**
* This class initiates an Apex CLI editor from a java main method.
*
* @author Liam Fallon (liam.fallon@ericsson.com)
*/
public class ApexCommandLineEditorMain {
// Get a reference to the logger
private static final XLogger LOGGER = XLoggerFactory.getXLogger(ApexCommandLineEditorMain.class);
// The editor parameters
private CommandLineParameters parameters;
// The CLI commands read in from JSON
private CommandLineCommands commands;
// The Apex model properties read in from JSON
private ApexModelProperties apexModelProperties;
// The number of errors encountered in command processing
private int errorCount = 0;
/**
* Instantiates the Apex CLI editor.
*
* @param args the command line arguments
*/
public ApexCommandLineEditorMain(final String[] args) {
String startMessage = "Starting Apex CLI editor " + Arrays.toString(args) + " . . .";
LOGGER.info(startMessage);
try {
final CommandLineParameterParser parser = new CommandLineParameterParser();
parameters = parser.parse(args);
if (parameters.isHelpSet()) {
CliUtils.help(ApexCommandLineEditorMain.class.getName(), parser.getOptions());
return;
}
parameters.validate();
} catch (final Exception e) {
LOGGER.error("start of Apex command line editor failed, ", e);
errorCount++;
return;
}
String message = "parameters are: " + parameters.toString();
LOGGER.debug(message);
// Read the command definitions
try {
commands = new JsonHandler<CommandLineCommands>().read(CommandLineCommands.class,
parameters.getMetadataStream());
} catch (final Exception e) {
LOGGER.error("start of Apex command line editor failed, error reading command metadata from {}",
parameters.getMetadataLocation(), e);
errorCount++;
return;
}
// The JSON processing returns null if there is an empty file
if (commands == null || commands.getCommandSet().isEmpty()) {
LOGGER.error("start of Apex command line editor failed, no commands found in {}",
parameters.getApexPropertiesLocation());
errorCount++;
return;
}
LOGGER.debug("found {} commands", commands.getCommandSet().size());
// Read the Apex properties
try {
apexModelProperties = new JsonHandler<ApexModelProperties>().read(ApexModelProperties.class,
parameters.getApexPropertiesStream());
} catch (final Exception e) {
LOGGER.error("start of Apex command line editor failed, error reading Apex model properties from "
+ parameters.getApexPropertiesLocation(), e);
errorCount++;
return;
}
// The JSON processing returns null if there is an empty file
if (apexModelProperties == null) {
LOGGER.error("start of Apex command line editor failed, no Apex model properties found in {}",
parameters.getApexPropertiesLocation());
errorCount++;
return;
}
String modelPropertiesString = "model properties are: " + apexModelProperties.toString();
LOGGER.debug(modelPropertiesString);
// Find the system commands
final Set<KeywordNode> systemCommandNodes = new TreeSet<>();
for (final CommandLineCommand command : commands.getCommandSet()) {
if (command.isSystemCommand()) {
systemCommandNodes.add(new KeywordNode(command.getName(), command));
}
}
// Read in the command hierarchy, this builds a tree of commands
final KeywordNode rootKeywordNode = new KeywordNode("root");
for (final CommandLineCommand command : commands.getCommandSet()) {
rootKeywordNode.processKeywords(command.getKeywordlist(), command);
}
rootKeywordNode.addSystemCommandNodes(systemCommandNodes);
// Create the model we will work towards
ApexModelHandler modelHandler = null;
try {
modelHandler = new ApexModelHandler(apexModelProperties.getProperties(),
parameters.getInputModelFileName());
} catch (final Exception e) {
LOGGER.error("execution of Apex command line editor failed: ", e);
errorCount++;
return;
}
final CommandLineEditorLoop cliEditorLoop = new CommandLineEditorLoop(apexModelProperties.getProperties(),
modelHandler, rootKeywordNode);
try {
errorCount = cliEditorLoop.runLoop(parameters.getCommandInputStream(), parameters.getOutputStream(),
parameters);
if (errorCount == 0) {
LOGGER.info("Apex CLI editor completed execution");
} else {
LOGGER.error("execution of Apex command line editor failed: {} command execution failure(s) occurred",
errorCount);
}
} catch (final IOException e) {
LOGGER.error("execution of Apex command line editor failed: " + e.getMessage(), e);
}
}
/**
* Get the number of errors encountered in command processing.
*
* @return the number of errors
*/
public int getErrorCount() {
return errorCount;
}
/**
* Sets the number of errors encountered in command processing.
*
* @param errorCount the number of errors
*/
public void setErrorCount(final int errorCount) {
this.errorCount = errorCount;
}
/**
* The main method, kicks off the editor.
*
* @param args the arguments
*/
public static void main(final String[] args) {
final ApexCommandLineEditorMain cliEditor = new ApexCommandLineEditorMain(args);
// Only call system.exit on errors as it brings the JVM down
if (cliEditor.getErrorCount() > 0) {
System.exit(cliEditor.getErrorCount());
}
}
}
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