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/*-
* ============LICENSE_START=======================================================
* Copyright (C) 2020-2021 AT&T Intellectual Property. All rights reserved.
* Modifications Copyright (C) 2020-2021 Bell Canada. All rights reserved.
* Modifications Copyright 2023-2024 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.models.simulators;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.util.Properties;
import java.util.concurrent.atomic.AtomicReference;
import lombok.AccessLevel;
import lombok.Getter;
import org.apache.commons.lang3.StringUtils;
import org.onap.policy.common.endpoints.http.server.HttpServletServer;
import org.onap.policy.common.endpoints.http.server.HttpServletServerFactoryInstance;
import org.onap.policy.common.endpoints.properties.PolicyEndPointProperties;
import org.onap.policy.common.gson.GsonMessageBodyHandler;
import org.onap.policy.common.parameters.BeanValidationResult;
import org.onap.policy.common.utils.coder.Coder;
import org.onap.policy.common.utils.coder.CoderException;
import org.onap.policy.common.utils.coder.StandardCoder;
import org.onap.policy.common.utils.network.NetworkUtil;
import org.onap.policy.common.utils.resources.ResourceUtils;
import org.onap.policy.common.utils.services.Registry;
import org.onap.policy.common.utils.services.ServiceManagerContainer;
import org.onap.policy.simulators.CdsSimulator;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* This class runs all simulators specified in the parameter file.
*/
public class Main extends ServiceManagerContainer {
private static final Logger logger = LoggerFactory.getLogger(Main.class);
private static final String CANNOT_CONNECT = "cannot connect to port ";
@Getter(AccessLevel.PROTECTED)
private static Main instance;
/**
* Runs the simulators.
*
* @param paramFile parameter file name
*/
public Main(String paramFile) {
super(Main.class.getPackage().getName());
SimulatorParameters params = readParameters(paramFile);
CdsServerParameters cdsServer = params.getGrpcServer();
// Cds Simulator
if (cdsServer != null) {
AtomicReference<CdsSimulator> cdsSim = new AtomicReference<>();
addAction(cdsServer.getName(), () -> cdsSim.set(buildCdsSimulator(cdsServer)), () -> cdsSim.get().stop());
}
// REST server simulators
// @formatter:off
for (ClassRestServerParameters restsim : params.getRestServers()) {
AtomicReference<HttpServletServer> ref = new AtomicReference<>();
if (StringUtils.isNotBlank(restsim.getResourceLocation())) {
String resourceLocationId = restsim.getProviderClass() + "_RESOURCE_LOCATION";
addAction(resourceLocationId,
() -> Registry.register(resourceLocationId, restsim.getResourceLocation()),
() -> Registry.unregister(resourceLocationId));
}
addAction(restsim.getName(),
() -> ref.set(buildRestServer(restsim)),
() -> ref.get().shutdown());
}
// @formatter:on
}
/**
* The main method. The arguments are validated, thus adding the NOSONAR.
*
* @param args the arguments, the first of which is the name of the parameter file
*/
public static void main(final String[] args) { // NOSONAR
/*
* Only one argument is used and is validated implicitly by the constructor (i.e.,
* file-not-found), thus sonar is disabled.
*/
try {
if (args.length != 1) {
throw new IllegalArgumentException("arg(s): parameter-file-name");
}
instance = new Main(args[0]);
instance.start();
} catch (RuntimeException e) {
logger.error("failed to start simulators", e);
}
}
private SimulatorParameters readParameters(String paramFile) {
try {
var paramsJson = getResourceAsString(paramFile);
if (paramsJson == null) {
throw new IllegalArgumentException(new FileNotFoundException(paramFile));
}
String hostName = NetworkUtil.getHostname();
logger.info("replacing 'HOST_NAME' with {} in {}", hostName, paramFile);
paramsJson = paramsJson.replace("${HOST_NAME}", hostName);
return makeCoder().decode(paramsJson, SimulatorParameters.class);
} catch (CoderException e) {
throw new IllegalArgumentException("cannot decode " + paramFile, e);
}
}
private CdsSimulator buildCdsSimulator(CdsServerParameters params) throws IOException {
var cdsSimulator = new CdsSimulator(params.getHost(), params.getPort(), params.getResourceLocation(),
params.getSuccessRepeatCount(), params.getRequestedResponseDelayMs());
cdsSimulator.start();
return cdsSimulator;
}
private HttpServletServer buildRestServer(ClassRestServerParameters params) {
try {
var props = getServerProperties(params);
HttpServletServer testServer = makeServer(props);
testServer.waitedStart(5000);
String svcpfx = PolicyEndPointProperties.PROPERTY_HTTP_SERVER_SERVICES + "." + params.getName();
String hostName = props.getProperty(svcpfx + PolicyEndPointProperties.PROPERTY_HTTP_HOST_SUFFIX);
if (!isTcpPortOpen(hostName, testServer.getPort())) {
throw new IllegalStateException(CANNOT_CONNECT + testServer.getPort());
}
return testServer;
} catch (InterruptedException e) {
Thread.currentThread().interrupt();
throw new IllegalStateException("interrupted while building " + params.getName(), e);
}
}
/**
* Creates a set of properties, suitable for building a REST server, from the
* parameters.
*
* @param params parameters from which to build the properties
* @return a Map of properties representing the given parameters
*/
private static Properties getServerProperties(ClassRestServerParameters params) {
final var props = new Properties();
props.setProperty(PolicyEndPointProperties.PROPERTY_HTTP_SERVER_SERVICES, params.getName());
final String svcpfx = PolicyEndPointProperties.PROPERTY_HTTP_SERVER_SERVICES + "." + params.getName();
props.setProperty(PolicyEndPointProperties.PROPERTY_HTTP_SERVER_SERVICES, params.getName());
props.setProperty(svcpfx + PolicyEndPointProperties.PROPERTY_HTTP_HOST_SUFFIX, params.getHost());
props.setProperty(svcpfx + PolicyEndPointProperties.PROPERTY_HTTP_PORT_SUFFIX,
Integer.toString(params.getPort()));
props.setProperty(svcpfx + PolicyEndPointProperties.PROPERTY_HTTP_HTTPS_SUFFIX,
Boolean.toString(params.isHttps()));
props.setProperty(svcpfx + PolicyEndPointProperties.PROPERTY_HTTP_REST_CLASSES_SUFFIX,
params.getProviderClass());
props.setProperty(svcpfx + PolicyEndPointProperties.PROPERTY_MANAGED_SUFFIX, "false");
props.setProperty(svcpfx + PolicyEndPointProperties.PROPERTY_HTTP_SWAGGER_SUFFIX, "false");
props.setProperty(svcpfx + PolicyEndPointProperties.PROPERTY_HTTP_SNI_HOST_CHECK_SUFFIX, "false");
props.setProperty(svcpfx + PolicyEndPointProperties.PROPERTY_MANAGED_SUFFIX, "true");
props.setProperty(svcpfx + PolicyEndPointProperties.PROPERTY_HTTP_SERIALIZATION_PROVIDER, String.join(",",
GsonMessageBodyHandler.class.getName(), TextMessageBodyHandler.class.getName()));
return props;
}
// the following methods may be overridden by junit tests
protected String getResourceAsString(String resourceName) {
return ResourceUtils.getResourceAsString(resourceName);
}
protected Coder makeCoder() {
return new StandardCoder();
}
protected HttpServletServer makeServer(Properties props) {
return HttpServletServerFactoryInstance.getServerFactory().build(props).get(0);
}
protected boolean isTcpPortOpen(String hostName, int port) throws InterruptedException {
return NetworkUtil.isTcpPortOpen(hostName, port, 100, 200L);
}
}
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