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// Copyright 2017 Yahoo Holdings. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.config.model.application.provider;
import com.yahoo.config.FileReference;
import com.yahoo.config.application.api.FileRegistry;
import com.yahoo.net.HostName;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.Reader;
import java.nio.ByteBuffer;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.regex.Pattern;
/**
* Registry of files added earlier (i.e. during deployment)
*
* @author Tony Vaagenes
*/
public class PreGeneratedFileRegistry implements FileRegistry {
private final String fileSourceHost;
private final Map<String, FileReference> path2Hash;
private static final String entryDelimiter = "\t";
private static final Pattern entryDelimiterPattern = Pattern.compile(entryDelimiter, Pattern.LITERAL);
public static Map<String, FileReference> decode(BufferedReader reader) {
Map<String, FileReference> refs = new HashMap<>();
try {
String line;
while ((line = reader.readLine()) != null) {
String[] parts = entryDelimiterPattern.split(line);
if (parts.length < 2)
throw new IllegalArgumentException("Cannot split '" + line + "' into two parts");
refs.put(parts[0], new FileReference(parts[1]));
}
} catch (IOException e) {
throw new RuntimeException("Error while reading pre-generated file registry", e);
}
return refs;
}
private PreGeneratedFileRegistry(Reader readerArg) {
try (BufferedReader reader = new BufferedReader(readerArg)) {
fileSourceHost = reader.readLine();
if (fileSourceHost == null)
throw new RuntimeException("Error while reading pre-generated file registry");
path2Hash = decode(reader);
} catch (IOException e) {
throw new RuntimeException("Error while reading pre-generated file registry", e);
}
}
public static String exportRegistry(FileRegistry registry) {
List<Entry> entries = registry.export();
StringBuilder builder = new StringBuilder();
builder.append(HostName.getLocalhost()).append('\n');
for (FileRegistry.Entry entry : entries) {
builder.append(entry.relativePath).append(entryDelimiter).append(entry.reference.value()).append('\n');
}
return builder.toString();
}
public static PreGeneratedFileRegistry importRegistry(Reader reader) {
return new PreGeneratedFileRegistry(reader);
}
public FileReference addFile(String relativePath) {
FileReference reference = path2Hash.get(relativePath);
if (reference == null) {
throw new IllegalArgumentException("File '" + relativePath + "' not found");
}
return reference;
}
@Override
public FileReference addUri(String uri) {
FileReference reference = path2Hash.get(uri);
if (reference == null) {
throw new IllegalArgumentException("Uri '" + uri + "' not found");
}
return reference;
}
@Override
public FileReference addBlob(ByteBuffer blob) {
String blobName = FileRegistry.blobName(blob);
FileReference reference = path2Hash.get(blobName);
if (reference == null) {
throw new IllegalArgumentException("Blob '" + blobName + "(" + blob.remaining()+ ")' not found");
}
return reference;
}
public Set<String> getPaths() {
return path2Hash.keySet();
}
@Override
public List<Entry> export() {
List<Entry> entries = new ArrayList<>();
for (Map.Entry<String, FileReference> entry : path2Hash.entrySet()) {
entries.add(new Entry(entry.getKey(), entry.getValue()));
}
return entries;
}
}
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