Mercurial > hg > release > thermostat-1.6
view thread/client-controllers/src/main/java/com/redhat/thermostat/thread/client/controller/impl/SessionCheckingAction.java @ 2049:a92d602216ad
Update copyright license headers for 2017
PR3290
Reviewed-by: jerboaa
Review-thread: http://icedtea.classpath.org/pipermail/thermostat/2017-January/021974.html
author | Andrew Azores <aazores@redhat.com> |
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date | Tue, 17 Jan 2017 12:19:56 -0500 |
parents | 9e860337de11 |
children |
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/* * Copyright 2012-2017 Red Hat, Inc. * * This file is part of Thermostat. * * Thermostat is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published * by the Free Software Foundation; either version 2, or (at your * option) any later version. * * Thermostat is distributed in the hope that it will be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * General Public License for more details. * * You should have received a copy of the GNU General Public License * along with Thermostat; see the file COPYING. If not see * <http://www.gnu.org/licenses/>. * * Linking this code with other modules is making a combined work * based on this code. Thus, the terms and conditions of the GNU * General Public License cover the whole combination. * * As a special exception, the copyright holders of this code give * you permission to link this code with independent modules to * produce an executable, regardless of the license terms of these * independent modules, and to copy and distribute the resulting * executable under terms of your choice, provided that you also * meet, for each linked independent module, the terms and conditions * of the license of that module. An independent module is a module * which is not derived from or based on this code. If you modify * this code, you may extend this exception to your version of the * library, but you are not obligated to do so. If you do not wish * to do so, delete this exception statement from your version. */ package com.redhat.thermostat.thread.client.controller.impl; import com.redhat.thermostat.common.model.Range; import com.redhat.thermostat.thread.model.SessionID; import java.util.concurrent.TimeUnit; /** */ public abstract class SessionCheckingAction implements Runnable { private SessionID lastSession; private long lastUpdate; public SessionCheckingAction() { lastUpdate = getTimeDeltaOnNewSession(); } protected long getTimeDeltaOnNewSession() { return System.currentTimeMillis() - TimeUnit.HOURS.toMillis(1); } /** * Returns the sessions ID the user wants to track, which can be null. */ protected abstract SessionID getCurrentSessionID(); /** * Returns the last available sessions ID. This is typically the sessions * with the most recent timestamp from a set of sessions. */ protected abstract SessionID getLastAvailableSessionID() ; /** * Returns the sessions id to track by this action, which is either the * session returned by {@link #getCurrentSessionID()} or, if null, * the one returned by {@link #getLastAvailableSessionID()}. */ protected SessionID getSessionID() { SessionID session = getCurrentSessionID(); if (session == null) { // no session selected, but let's try to default to the last // available session = getLastAvailableSessionID(); } return session; } /** * The actual action to perform. */ protected abstract void actionPerformed(SessionID session, Range<Long> range, Range<Long> totalRange); protected abstract Range<Long> getTotalRange(SessionID session); protected Range<Long> getRange(SessionID session, Range<Long> totalRange) { if (totalRange == null) { // there is range to check return null; } if (lastUpdate == totalRange.getMax()) { // we already covered this range return null; } Range<Long> result = new Range<>(lastUpdate, totalRange.getMax()); lastUpdate = totalRange.getMax(); return result; } protected boolean isRangeValid(Range<Long> range, Range<Long> totalRange) { return totalRange != null && range != null; } protected boolean isSessionValid(SessionID session) { return session != null; } /** * Determine if the session in input is a new session. By default the * implementation checks the sessions against the last session. */ protected boolean isNewSession(SessionID session) { boolean result = (lastSession == null || !session.get().equals(lastSession.get())); lastSession = session; return result; } /** * Called when a new session is detected, as defined by * {@link #isNewSession(SessionID)}. */ protected void onNewSession() {} @Override public void run() { SessionID session = getSessionID(); if (!isSessionValid(session)) { return; } if (isNewSession(session)) { lastUpdate = getTimeDeltaOnNewSession(); onNewSession(); } Range<Long> totalRange = getTotalRange(session); Range<Long> range = getRange(session, totalRange); if (isRangeValid(range, totalRange)) { actionPerformed(session, range, totalRange); } } }