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// Copyright Vespa.ai. 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.fasterxml.jackson.databind.ObjectMapper;
import com.yahoo.config.application.api.ApplicationFile;
import com.yahoo.io.IOUtils;
import com.yahoo.path.Path;
import com.yahoo.vespa.config.util.ConfigUtils;
import com.yahoo.yolean.Exceptions;
import java.io.File;
import java.io.FileFilter;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.Reader;
import java.util.ArrayList;
import java.util.List;
import java.util.logging.Level;
import java.util.logging.Logger;
/**
* @author Ulf Lilleengen
* @author Vegard Havdal
*/
public class FilesApplicationFile extends ApplicationFile {
private static final Logger log = Logger.getLogger("FilesApplicationFile");
private final File file;
private final ObjectMapper mapper = new ObjectMapper();
public FilesApplicationFile(Path path, File file) {
super(path);
this.file = file;
}
@Override
public boolean isDirectory() {
return file.isDirectory();
}
@Override
public boolean exists() {
return file.exists();
}
@Override
public ApplicationFile delete() {
log.log(Level.FINE, () -> "Delete " + file);
if (file.isDirectory() && !listFiles().isEmpty()) {
throw new RuntimeException("files. Can't delete, directory not empty: " + this + "(" + listFiles() + ")." + listFiles().size());
}
if (file.isDirectory() && file.listFiles() != null && file.listFiles().length > 0) {
for (File f : file.listFiles()) {
deleteFile(f);
}
}
if (!file.delete()) {
throw new IllegalStateException("Unable to delete: "+this);
}
try {
writeMetaFile("", ApplicationFile.ContentStatusDeleted);
} catch (IOException e) {
throw new RuntimeException(e);
}
return this;
}
public static boolean deleteFile(File path) {
if( path.exists() ) {
if (path.isDirectory()) {
File[] files = path.listFiles();
for(int i=0; i<files.length; i++) {
if(files[i].isDirectory()) {
deleteFile(files[i]);
} else {
files[i].delete();
}
}
}
}
return(path.delete());
}
@Override
public Reader createReader() throws FileNotFoundException {
return new FileReader(file);
}
@Override
public InputStream createInputStream() throws FileNotFoundException {
return new FileInputStream(file);
}
@Override
public ApplicationFile createDirectory() {
if (file.isDirectory()) return this;
if (file.exists()) {
throw new IllegalArgumentException("Unable to create directory, file exists: "+file);
}
if (!file.mkdirs()) {
throw new IllegalArgumentException("Unable to create directory: "+file);
}
try {
writeMetaFile("", ApplicationFile.ContentStatusNew);
} catch (IOException e) {
throw new RuntimeException(e);
}
return this;
}
@Override
public ApplicationFile writeFile(Reader input) {
if (file.getParentFile() != null) {
file.getParentFile().mkdirs();
}
try {
String status = file.exists() ? ApplicationFile.ContentStatusChanged : ApplicationFile.ContentStatusNew;
String data = com.yahoo.io.IOUtils.readAll(input);
IOUtils.writeFile(file, data, false);
writeMetaFile(data, status);
} catch (IOException e) {
throw new RuntimeException(e);
}
return this;
}
@Override
public ApplicationFile appendFile(String value) {
if (file.getParentFile() != null) {
file.getParentFile().mkdirs();
}
try {
String status = file.exists() ? ApplicationFile.ContentStatusChanged : ApplicationFile.ContentStatusNew;
IOUtils.writeFile(file, value, true);
writeMetaFile(value, status);
} catch (IOException e) {
throw new RuntimeException(e);
}
return this;
}
@Override
public List<ApplicationFile> listFiles(final PathFilter filter) {
List<ApplicationFile> files = new ArrayList<>();
if (!file.isDirectory()) {
return files;
}
FileFilter fileFilter = pathname -> filter.accept(path.append(pathname.getName()));
for (File child : file.listFiles(fileFilter)) {
// Ignore dot-files.
if (!child.getName().startsWith(".")) {
files.add(new FilesApplicationFile(path.append(child.getName()), child));
}
}
return files;
}
private void writeMetaFile(String data, String status) throws IOException {
File metaDir = createMetaDir();
log.log(Level.FINE, () -> "meta dir=" + metaDir);
File metaFile = new File(metaDir + "/" + getPath().getName());
if (status == null) {
status = ApplicationFile.ContentStatusNew;
if (metaFile.exists()) {
status = ApplicationFile.ContentStatusChanged;
}
}
String hash;
if (file.isDirectory() || status.equals(ApplicationFile.ContentStatusDeleted)) {
hash = "";
} else {
hash = ConfigUtils.getMd5(data);
}
mapper.writeValue(metaFile, new MetaData(status, hash));
}
private File createMetaDir() {
File metaDir = getMetaDir();
if (!metaDir.exists()) {
log.log(Level.FINE, () -> "Creating meta dir " + metaDir);
metaDir.mkdirs();
}
return metaDir;
}
private File getMetaDir() {
String substring = file.getAbsolutePath().substring(0, file.getAbsolutePath().lastIndexOf("/") + 1);
return new File(substring + Path.fromString(".meta/"));
}
public MetaData getMetaData() {
File metaDir = getMetaDir();
File metaFile = new File(metaDir + "/" + getPath().getName());
log.log(Level.FINE, () -> "Getting metadata for " + metaFile);
if (metaFile.exists()) {
try {
return mapper.readValue(metaFile, MetaData.class);
} catch (IOException e) {
System.out.println("whot:" + Exceptions.toMessageString(e));
// return below
}
}
try {
if (file.isDirectory()) {
return new MetaData(ApplicationFile.ContentStatusNew, "");
} else {
return new MetaData(ApplicationFile.ContentStatusNew, ConfigUtils.getMd5(IOUtils.readAll(createReader())));
}
} catch (IOException | IllegalArgumentException e) {
return null;
}
}
@Override public long getSize() { return file.length(); }
@Override
public int compareTo(ApplicationFile other) {
if (other == this) return 0;
return this.getPath().getName().compareTo((other).getPath().getName());
}
}
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