Java tutorial
/* * Copyright 2015 Lithium Technologies, Inc. * * 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 com.lithium.flow.filer.hash; import com.lithium.flow.config.Config; import com.lithium.flow.filer.DecoratedFiler; import com.lithium.flow.filer.Filer; import com.lithium.flow.jetty.JettyClient; import com.lithium.flow.util.BaseEncodings; import java.io.IOException; import java.util.Scanner; import javax.annotation.Nonnull; import org.apache.commons.io.IOUtils; import com.google.common.io.BaseEncoding; /** * @author Matt Ayres */ public class ClientHashFiler extends DecoratedFiler { private final BaseEncoding encoding = BaseEncoding.base16().lowerCase(); private final JettyClient client; public ClientHashFiler(@Nonnull Filer delegate, @Nonnull Config config) throws Exception { super(delegate); client = new JettyClient(config.prefix("hash")); } @Override @Nonnull public String getHash(@Nonnull String path, @Nonnull String hash, @Nonnull String base) throws IOException { return client.call("hash " + path, input -> { Scanner scanner = new Scanner(input); scanner.next(); // size String value = scanner.next(); scanner.next(); // status return BaseEncodings.of(base).encode(encoding.decode(value)); }); } @Override public void close() throws IOException { IOUtils.closeQuietly(client); super.close(); } }