com.couchbase.client.protocol.views.HttpOperationImpl.java Source code

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Here is the source code for com.couchbase.client.protocol.views.HttpOperationImpl.java

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/**
 * Copyright (C) 2009-2013 Couchbase, Inc.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALING
 * IN THE SOFTWARE.
 */

package com.couchbase.client.protocol.views;

import java.io.IOException;
import java.text.ParseException;

import net.spy.memcached.ops.OperationCallback;
import net.spy.memcached.ops.OperationErrorType;
import net.spy.memcached.ops.OperationException;
import net.spy.memcached.ops.OperationStatus;

import org.apache.http.HttpRequest;
import org.apache.http.HttpResponse;
import org.apache.http.util.EntityUtils;
import org.codehaus.jettison.json.JSONException;
import org.codehaus.jettison.json.JSONObject;

/**
 * An HttpOperationImpl.
 */
public abstract class HttpOperationImpl implements HttpOperation {

    private final HttpRequest request;
    protected final OperationCallback callback;
    protected OperationException exception;
    private volatile boolean cancelled;
    private volatile boolean errored;
    private volatile boolean timedOut;

    public HttpOperationImpl(HttpRequest r, OperationCallback cb) {
        request = r;
        callback = cb;
        exception = null;
        cancelled = false;
        errored = false;
        timedOut = false;
    }

    public HttpRequest getRequest() {
        return request;
    }

    public OperationCallback getCallback() {
        return callback;
    }

    public boolean isCancelled() {
        return cancelled;
    }

    public boolean hasErrored() {
        return errored;
    }

    public boolean isTimedOut() {
        return timedOut;
    }

    public void cancel() {
        cancelled = true;
    }

    public void timeOut() {
        timedOut = true;
    }

    public OperationException getException() {
        return exception;
    }

    public void setException(OperationException e) {
        errored = true;
        exception = e;
    }

    public void addAuthHeader(String authzn) {
        request.addHeader("Authorization", authzn);
    }

    public abstract void handleResponse(HttpResponse response);

    protected String getEntityString(HttpResponse response) {
        if (!isTimedOut() && !hasErrored() && !isCancelled()) {
            try {
                return EntityUtils.toString(response.getEntity());
            } catch (org.apache.http.ParseException e) {
                exception = new OperationException(OperationErrorType.GENERAL, "Bad http headers");
                errored = true;
            } catch (IOException e) {
                exception = new OperationException(OperationErrorType.GENERAL, "Error reading response");
                errored = true;
            } catch (IllegalArgumentException e) {
                exception = new OperationException(OperationErrorType.GENERAL, "No entity");
                errored = true;
            }
        }
        return null;
    }

    protected OperationStatus parseViewForStatus(String json, int errorcode) throws ParseException {
        if (json != null) {
            try {
                JSONObject base = new JSONObject(json);
                if (base.has("error")) {
                    String error = "Error Code: " + errorcode + " Error: " + base.getString("error");
                    if (base.has("reason")) {
                        error += " Reason: " + base.getString("reason");
                    }
                    return new OperationStatus(false, error);
                } else {
                    return new OperationStatus(true, "Error Code: " + errorcode);
                }
            } catch (JSONException e) {
                throw new ParseException("Cannot read json: " + json, 0);
            }
        }
        return new OperationStatus(false, "Error Code: " + errorcode + "No entity");
    }

    @Override
    public String toString() {
        StringBuilder rv = new StringBuilder(HttpOperationImpl.class.getName());
        rv.append(" request:").append(getRequest()).append(" has errored: ").append(hasErrored())
                .append(" is  cancelled: ").append(isCancelled()).append(" is timed out: ").append(isTimedOut());
        if (null != getException()) {
            rv.append(" with contained exception: ").append(getException().getClass().getName()).append(": ")
                    .append(getException().getMessage());
        }
        return rv.toString();

    }

}