144 lines
4.1 KiB
Java
144 lines
4.1 KiB
Java
package org.gcube.core.smartgears.monitor;
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import static org.gcube.smartgears.Constants.frontpage_file_path;
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import static org.gcube.smartgears.handlers.application.request.RequestError.application_error;
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import static org.gcube.smartgears.provider.ProviderFactory.provider;
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import static org.gcube.smartgears.utils.Utils.closeSafely;
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import java.io.BufferedReader;
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import java.io.IOException;
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import java.io.InputStream;
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import java.io.InputStreamReader;
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import java.util.Collection;
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import java.util.HashMap;
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import java.util.HashSet;
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import java.util.Map;
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import java.util.Set;
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import java.util.regex.Matcher;
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import java.util.regex.Pattern;
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import javax.servlet.annotation.WebServlet;
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import javax.servlet.http.HttpServlet;
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import javax.servlet.http.HttpServletRequest;
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import javax.servlet.http.HttpServletResponse;
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import org.gcube.common.scope.impl.ScopeBean;
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import org.gcube.smartgears.ContextProvider;
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import org.gcube.smartgears.context.application.ApplicationContext;
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import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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@WebServlet(urlPatterns = "/", name = "smartgearsManagementServlet")
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public class SmartgearsMonitorServlet extends HttpServlet {
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/**
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*
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*/
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private static final long serialVersionUID = 1L;
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// the variable replacement pattern
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private static Pattern pattern = Pattern.compile("\\$\\{(.+?)\\}");
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// log on behalf of extension
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private static final Logger log = LoggerFactory.getLogger(SmartgearsMonitorServlet.class);
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public static final String mapping = "/";
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public void doGet(HttpServletRequest request, HttpServletResponse response)
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throws IOException {
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InputStream page = getClass().getResourceAsStream(frontpage_file_path);
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if (page == null) {
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log.error("invalid distribution: missing {}", frontpage_file_path);
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application_error.fire("invalid distribution: missing " + frontpage_file_path);
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}
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Map<String, String> values = values();
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BufferedReader reader = null;
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try {
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String line = null;
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reader = new BufferedReader(new InputStreamReader(page));
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while ((line = reader.readLine()) != null)
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response.getWriter().write(interpolate(line, values));
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} catch (Exception e) {
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application_error.fire("could not read " + frontpage_file_path, e);
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} finally {
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closeSafely(reader);
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}
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}
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private Map<String, String> values() {
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ApplicationContext context = ContextProvider.get();
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Map<String, String> values = new HashMap<String, String>();
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values.put("profile_link", "[profile link]");
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values.put("config_link", "[config link]");
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values.put("name", context.name());
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values.put("version", context.configuration().version());
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String infrastructure = context.container().configuration().infrastructure();
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StringBuilder voValue = new StringBuilder();
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Collection<String> scopes = context.profile().scopes().asCollection();
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Set<String> vos = new HashSet<String>();
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//pre-process
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for (String scope : scopes) {
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ScopeBean bean = new ScopeBean(scope);
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switch (bean.type()) {
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case INFRASTRUCTURE:
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infrastructure = bean.name();
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break;
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case VO:
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vos.add(bean.name());
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break;
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case VRE:
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vos.add(bean.enclosingScope().name());
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infrastructure=bean.enclosingScope().enclosingScope().name();
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}
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}
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//build vo value
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int i = 0;
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int max = vos.size()-1;
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for (String vo : vos) {
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String voPrefix = i == 0 ? "" : (i==max?" and ":", ");
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voValue.append(voPrefix+"<em>" + vo + "</em>");
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i++;
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}
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values.put("infra", infrastructure);
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values.put("vos", voValue.toString());
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values.put("status", context.lifecycle().state().toString());
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values.put("smartgears-version", provider().smartgearsConfiguration().version());
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return values;
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}
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public static String interpolate(String text, Map<String, String> replacements) {
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Matcher matcher = pattern.matcher(text);
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StringBuffer buffer = new StringBuffer();
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while (matcher.find()) {
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String replacement = replacements.get(matcher.group(1));
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if (replacement != null) {
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matcher.appendReplacement(buffer, ""); // safer in case replacements include some of the variable
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// characters
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buffer.append(replacement);
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}
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}
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matcher.appendTail(buffer);
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return buffer.toString();
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}
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} |