org.apache.beam.runners.dataflow.worker.fn.SocketAddressFactory.java Source code

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Here is the source code for org.apache.beam.runners.dataflow.worker.fn.SocketAddressFactory.java

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/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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.apache.beam.runners.dataflow.worker.fn;

import static com.google.common.base.Preconditions.checkArgument;

import com.google.common.net.HostAndPort;
import java.io.File;
import java.io.IOException;
import java.net.InetSocketAddress;
import java.net.SocketAddress;
import org.apache.beam.vendor.netty.v4.io.netty.channel.unix.DomainSocketAddress;

/**
 * Creates a {@link SocketAddress} based upon a supplied string.
 *
 * <p>Note that this is a clone of {@code SocketAddressFactory} in the SDK Fn Harness (currently
 * {@code FnHarness.java}).
 */
public class SocketAddressFactory {
    private static final String UNIX_DOMAIN_SOCKET_PREFIX = "unix://";

    /** Parse a {@link SocketAddress} from the given string. */
    public static SocketAddress createFrom(String value) {
        if (value.startsWith(UNIX_DOMAIN_SOCKET_PREFIX)) {
            // Unix Domain Socket address.
            // Create the underlying file for the Unix Domain Socket.
            String filePath = value.substring(UNIX_DOMAIN_SOCKET_PREFIX.length());
            File file = new File(filePath);
            if (!file.isAbsolute()) {
                throw new IllegalArgumentException("File path must be absolute: " + filePath);
            }
            try {
                if (file.createNewFile()) {
                    // If this application created the file, delete it when the application exits.
                    file.deleteOnExit();
                }
            } catch (IOException ex) {
                throw new RuntimeException(ex);
            }
            // Create the SocketAddress referencing the file.
            return new DomainSocketAddress(file);
        } else {
            // Standard TCP/IP address.
            HostAndPort hostAndPort = HostAndPort.fromString(value);
            checkArgument(hostAndPort.hasPort(),
                    "Address must be a unix:// path or be in the form host:port. Got: %s", value);
            return new InetSocketAddress(hostAndPort.getHost(), hostAndPort.getPort());
        }
    }
}