| /* |
| * 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.maven.cli.transfer; |
| |
| import java.io.PrintStream; |
| import java.util.Iterator; |
| import java.util.LinkedHashMap; |
| import java.util.Locale; |
| import java.util.Map; |
| |
| import org.eclipse.aether.transfer.TransferCancelledException; |
| import org.eclipse.aether.transfer.TransferEvent; |
| import org.eclipse.aether.transfer.TransferResource; |
| |
| /** |
| * Console download progress meter. |
| * |
| */ |
| public class ConsoleMavenTransferListener extends AbstractMavenTransferListener { |
| |
| private Map<TransferResource, Long> transfers = new LinkedHashMap<>(); |
| private FileSizeFormat format = new FileSizeFormat(Locale.ENGLISH); // use in a synchronized fashion |
| private StringBuilder buffer = new StringBuilder(128); // use in a synchronized fashion |
| |
| private boolean printResourceNames; |
| private int lastLength; |
| |
| public ConsoleMavenTransferListener(PrintStream out, boolean printResourceNames) { |
| super(out); |
| this.printResourceNames = printResourceNames; |
| } |
| |
| @Override |
| public synchronized void transferInitiated(TransferEvent event) { |
| overridePreviousTransfer(event); |
| |
| super.transferInitiated(event); |
| } |
| |
| @Override |
| public synchronized void transferCorrupted(TransferEvent event) throws TransferCancelledException { |
| overridePreviousTransfer(event); |
| |
| super.transferCorrupted(event); |
| } |
| |
| @Override |
| public synchronized void transferProgressed(TransferEvent event) throws TransferCancelledException { |
| TransferResource resource = event.getResource(); |
| transfers.put(resource, event.getTransferredBytes()); |
| |
| buffer.append("Progress (").append(transfers.size()).append("): "); |
| |
| Iterator<Map.Entry<TransferResource, Long>> entries = |
| transfers.entrySet().iterator(); |
| while (entries.hasNext()) { |
| Map.Entry<TransferResource, Long> entry = entries.next(); |
| long total = entry.getKey().getContentLength(); |
| Long complete = entry.getValue(); |
| |
| String resourceName = entry.getKey().getResourceName(); |
| |
| if (printResourceNames) { |
| int idx = resourceName.lastIndexOf('/'); |
| |
| if (idx < 0) { |
| buffer.append(resourceName); |
| } else { |
| buffer.append(resourceName, idx + 1, resourceName.length()); |
| } |
| buffer.append(" ("); |
| } |
| |
| format.formatProgress(buffer, complete, total); |
| |
| if (printResourceNames) { |
| buffer.append(")"); |
| } |
| |
| if (entries.hasNext()) { |
| buffer.append(" | "); |
| } |
| } |
| |
| int pad = lastLength - buffer.length(); |
| lastLength = buffer.length(); |
| pad(buffer, pad); |
| buffer.append('\r'); |
| out.print(buffer); |
| out.flush(); |
| buffer.setLength(0); |
| } |
| |
| private void pad(StringBuilder buffer, int spaces) { |
| String block = " "; |
| while (spaces > 0) { |
| int n = Math.min(spaces, block.length()); |
| buffer.append(block, 0, n); |
| spaces -= n; |
| } |
| } |
| |
| @Override |
| public synchronized void transferSucceeded(TransferEvent event) { |
| transfers.remove(event.getResource()); |
| overridePreviousTransfer(event); |
| |
| super.transferSucceeded(event); |
| } |
| |
| @Override |
| public synchronized void transferFailed(TransferEvent event) { |
| transfers.remove(event.getResource()); |
| overridePreviousTransfer(event); |
| |
| super.transferFailed(event); |
| } |
| |
| private void overridePreviousTransfer(TransferEvent event) { |
| if (lastLength > 0) { |
| pad(buffer, lastLength); |
| buffer.append('\r'); |
| out.print(buffer); |
| out.flush(); |
| lastLength = 0; |
| buffer.setLength(0); |
| } |
| } |
| } |