io.soabase.core.features.client.ClientUtils.java Source code

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Here is the source code for io.soabase.core.features.client.ClientUtils.java

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/**
 * Copyright 2014 Jordan Zimmerman
 *
 * 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 io.soabase.core.features.client;

import com.google.common.base.Preconditions;
import io.soabase.core.features.discovery.SoaDiscovery;
import io.soabase.core.features.discovery.SoaDiscoveryInstance;
import java.net.URI;
import java.net.URISyntaxException;

public class ClientUtils {
    public static final String HOST_SUBSTITUTION_TOKEN = "0.";

    public static String hostToServiceName(String host) {
        host = Preconditions.checkNotNull(host, "Request URI's host cannot be null");
        if (host.startsWith(HOST_SUBSTITUTION_TOKEN) && (host.length() > HOST_SUBSTITUTION_TOKEN.length())) {
            return host.substring(HOST_SUBSTITUTION_TOKEN.length());
        }
        return null;
    }

    public static String serviceNameToHost(String serviceName) {
        return HOST_SUBSTITUTION_TOKEN + serviceName;
    }

    public static SoaDiscoveryInstance hostToInstance(SoaDiscovery discovery, String host) {
        String serviceName = hostToServiceName(host);
        if (serviceName != null) {
            return Preconditions.checkNotNull(discovery.getInstance(serviceName),
                    "No instance found for " + serviceName);
        }
        return null;
    }

    public static URI filterUri(URI uri, SoaDiscoveryInstance instance) {
        if (instance != null) {
            try {
                String scheme = instance.isForceSsl() ? "https"
                        : ((uri.getScheme() != null) ? uri.getScheme() : "http");
                return new URI(scheme, uri.getUserInfo(), instance.getHost(), instance.getPort(), uri.getRawPath(),
                        uri.getRawQuery(), uri.getRawFragment());
            } catch (URISyntaxException e) {
                // TODO logging
                throw new RuntimeException(e);
            }
        }
        return null;
    }

    private ClientUtils() {
    }
}