org.commonjava.maven.galley.transport.htcli.internal.HttpExistence.java Source code

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Here is the source code for org.commonjava.maven.galley.transport.htcli.internal.HttpExistence.java

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/**
 * Copyright (C) 2013 Red Hat, Inc. (jdcasey@commonjava.org)
 *
 * Licensed 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 org.commonjava.maven.galley.transport.htcli.internal;

import org.apache.http.client.methods.HttpHead;
import org.commonjava.maven.galley.TransferException;
import org.commonjava.maven.galley.model.Transfer;
import org.commonjava.maven.galley.spi.transport.ExistenceJob;
import org.commonjava.maven.galley.transport.htcli.Http;
import org.commonjava.maven.galley.transport.htcli.model.HttpLocation;

import com.fasterxml.jackson.databind.ObjectMapper;

public final class HttpExistence extends AbstractHttpJob implements ExistenceJob {

    private final ObjectMapper mapper;

    private final Transfer transfer;

    public HttpExistence(final String url, final HttpLocation location, final Transfer transfer, final Http http,
            final ObjectMapper mapper) {
        super(url, location, http);
        this.transfer = transfer;
        this.mapper = mapper;
    }

    @Override
    public Boolean call() {
        String oldName = Thread.currentThread().getName();

        request = new HttpHead(url);

        try {
            String newName = oldName + ": EXISTS " + url;
            Thread.currentThread().setName(newName);

            if (executeHttp()) {
                return true;
            }
        } catch (final TransferException e) {
            this.error = e;
        } finally {
            cleanup();
            if (oldName != null) {
                Thread.currentThread().setName(oldName);
            }
        }

        return false;
    }

    @Override
    protected Transfer getTransfer() {
        return transfer;
    }

    @Override
    protected ObjectMapper getMetadataObjectMapper() {
        return mapper;
    }
}