org.eclipse.scada.hd.exporter.http.client.HdHttpClient.java Source code

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Here is the source code for org.eclipse.scada.hd.exporter.http.client.HdHttpClient.java

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/*******************************************************************************
 * Copyright (c) 2010, 2014 TH4 SYSTEMS GmbH and others.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *     TH4 SYSTEMS GmbH - initial API and implementation
 *     IBH SYSTEMS GmbH - some bugfixes and modifications
 *******************************************************************************/
package org.eclipse.scada.hd.exporter.http.client;

import java.net.URLEncoder;
import java.util.Date;
import java.util.List;
import java.util.concurrent.TimeUnit;

import org.apache.commons.httpclient.HttpClient;
import org.apache.commons.httpclient.HttpMethod;
import org.apache.commons.httpclient.HttpStatus;
import org.apache.commons.httpclient.methods.GetMethod;
import org.eclipse.scada.hd.exporter.http.DataPoint;
import org.eclipse.scada.hd.exporter.http.HttpExporter;
import org.eclipse.scada.hd.exporter.http.Utils;

public class HdHttpClient implements HttpExporter {
    private final String baseUrl;

    private final long timeout;

    public HdHttpClient(final String url, final long timeout, final TimeUnit timeUnit) {
        this.baseUrl = url;
        this.timeout = TimeUnit.MILLISECONDS.convert(timeout, timeUnit);
    }

    public List<DataPoint> getData(final String item, final String type, final Date from, final Date to,
            final Integer number) throws Exception {
        final HttpClient client = new HttpClient();
        final HttpMethod method = new GetMethod(
                this.baseUrl + "/" + URLEncoder.encode(item, "UTF-8") + "/" + URLEncoder.encode(type, "UTF-8")
                        + "?from=" + URLEncoder.encode(Utils.isoDateFormat.format(from), "UTF-8") + "&to="
                        + URLEncoder.encode(Utils.isoDateFormat.format(to), "UTF-8") + "&no=" + number);
        client.getParams().setSoTimeout((int) this.timeout);
        try {
            final int status = client.executeMethod(method);
            if (status != HttpStatus.SC_OK) {
                throw new RuntimeException("Method failed with error " + status + " " + method.getStatusLine());
            }
            return Utils.fromJson(method.getResponseBodyAsString());
        } finally {
            method.releaseConnection();
        }
    }

    public List<String> getItems() throws Exception {
        throw new IllegalArgumentException("not implemented");
    }

    public List<String> getSeries(final String itemId) throws Exception {
        throw new IllegalArgumentException("not implemented");
    }

    @Override
    public void dispose() throws Exception {
    }
}