/**
* Copyright 2005-2016 Red Hat, Inc.
*
* Red Hat licenses this file to you 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.
*/
/**
* Copyright 2005-2016 Red Hat, Inc.
*
* Red Hat licenses this file to you 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.fabric8.karaf.checks.internal;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.CopyOnWriteArrayList;
import io.fabric8.karaf.checks.Check;
import io.fabric8.karaf.checks.ReadinessChecker;
public class ReadinessCheckServlet extends HttpServlet {
private final CopyOnWriteArrayList<ReadinessChecker> checkers;
public ReadinessCheckServlet(CopyOnWriteArrayList<ReadinessChecker> readinessCheckers) {
this.checkers = readinessCheckers;
}
@Override
protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
List<Check> checks = new ArrayList<>();
for (ReadinessChecker checker : checkers) {
checks.addAll(checker.getFailingReadinessChecks());
}
if (checks.isEmpty()) {
resp.getWriter().println("READY");
} else {
resp.setStatus(503);
resp.getWriter().println("NOT READY");
for (Check check : checks) {
resp.getWriter().println(check.getName() + ": " + check.getLongDescription());
}
}
}
}