io.github.jhipster.config.h2.H2ConfigurationHelper Maven / Gradle / Ivy
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Server-side library used by applications created with the JHipster generator, see https://www.jhipster.tech/ for more information on JHipster
/*
* Copyright 2016-2018 the original author or authors from the JHipster project.
*
* This file is part of the JHipster project, see https://www.jhipster.tech/
* for more information.
*
* 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.
*/
package io.github.jhipster.config.h2;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.sql.SQLException;
import javax.servlet.*;
/**
* Utility class to configure H2 in development.
*
* We don't want to include H2 when we are packaging for the "prod" profile and won't
* actually need it, so we have to load / invoke things at runtime through reflection.
*/
public class H2ConfigurationHelper {
public static Object createServer() throws SQLException {
try {
ClassLoader loader = Thread.currentThread().getContextClassLoader();
Class serverClass = Class.forName("org.h2.tools.Server", true, loader);
Method createServer = serverClass.getMethod("createTcpServer", String[].class);
return createServer.invoke(null, new Object[] { new String[] { "-tcp", "-tcpAllowOthers" } });
} catch (ClassNotFoundException | LinkageError e) {
throw new RuntimeException("Failed to load and initialize org.h2.tools.Server", e);
} catch (SecurityException | NoSuchMethodException e) {
throw new RuntimeException("Failed to get method org.h2.tools.Server.createTcpServer()", e);
} catch (IllegalAccessException | IllegalArgumentException e) {
throw new RuntimeException("Failed to invoke org.h2.tools.Server.createTcpServer()", e);
} catch (InvocationTargetException e) {
Throwable t = e.getTargetException();
if (t instanceof SQLException) {
throw (SQLException) t;
}
throw new RuntimeException("Unchecked exception in org.h2.tools.Server.createTcpServer()", t);
}
}
public static void initH2Console(ServletContext servletContext) {
try {
// We don't want to include H2 when we are packaging for the "prod" profile and won't
// actually need it, so we have to load / invoke things at runtime through reflection.
ClassLoader loader = Thread.currentThread().getContextClassLoader();
Class servletClass = Class.forName("org.h2.server.web.WebServlet", true, loader);
Servlet servlet = (Servlet) servletClass.newInstance();
ServletRegistration.Dynamic h2ConsoleServlet = servletContext.addServlet("H2Console", servlet);
h2ConsoleServlet.addMapping("/h2-console/*");
h2ConsoleServlet.setInitParameter("-properties", "src/main/resources/");
h2ConsoleServlet.setLoadOnStartup(1);
} catch (ClassNotFoundException | LinkageError e) {
throw new RuntimeException("Failed to load and initialize org.h2.server.web.WebServlet", e);
} catch (IllegalAccessException | InstantiationException e) {
throw new RuntimeException("Failed to instantiate org.h2.server.web.WebServlet", e);
}
}
}