+ Documentation

Signed-off-by: Johannes Theiner <j.theiner@live.de>
#SPM-7: add work documentation 20m
This commit is contained in:
Johannes Theiner 2019-05-03 16:52:20 +02:00
parent b50a490cd4
commit d5b4888d5d
4 changed files with 82 additions and 12 deletions

View File

@ -5,13 +5,15 @@ import org.jetbrains.annotations.Contract;
import org.jetbrains.annotations.NotNull;
import java.io.File;
import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.util.UUID;
import java.util.concurrent.ConcurrentLinkedQueue;
/**
*
* manages data about .csv files.
*
* @author Johannes Theiner
* @version 0.1
@ -23,17 +25,44 @@ public class Data {
private static ConcurrentLinkedQueue<SavedFile> files = new ConcurrentLinkedQueue<>();
/**
* adds file to list and generates a new filename.
*
* @param name File name
* @return path to save file to
*/
@NotNull
static Path add(@NotNull String name) {
//cleanup old files
if (files.isEmpty()) {
try {
Files.list(Paths.get("target/")).forEach(path -> {
if (path.toFile().getName().endsWith(".csv")) {
try {
Files.delete(path);
} catch (IOException e) {
e.printStackTrace();
}
}
});
} catch (IOException ex) {
ex.printStackTrace();
}
}
Path path;
UUID uuid = UUID.randomUUID();
if (files.size() >= 5) {
//remove last and add new one
SavedFile file = files.poll();
if (!get(file.getUuid()).delete()) {
System.out.println("failed");
System.out.println("failed to delete file...");
}
path = Paths.get(getFileName(uuid));
files.offer(new SavedFile(uuid, name));
} else {
files.add(new SavedFile(uuid, name));
path = Paths.get(getFileName(uuid));
@ -41,11 +70,24 @@ public class Data {
return path;
}
/**
* generates File from uuid.
*
* @param uuid uuid
* @return file
*/
@Contract
@NotNull public static File get(@NotNull UUID uuid) {
@NotNull
public static File get(@NotNull UUID uuid) {
return new File(getFileName(uuid));
}
/**
* generates file name from uuid.
*
* @param uuid uuid
* @return file name
*/
@Contract(pure = true)
@NotNull
private static String getFileName(@NotNull UUID uuid) {

View File

@ -22,12 +22,21 @@ import java.nio.charset.StandardCharsets;
@WebServlet("/files")
public class Files extends HttpServlet {
private static final long serialVersionUID = 148451844848L;
/**
* do get.
* @param req request
* @param resp response
* @throws IOException writer could not be retrieved
*/
@Override
protected void doGet(@NotNull HttpServletRequest req, @NotNull HttpServletResponse resp) throws IOException {
protected void doGet(@NotNull HttpServletRequest req, @NotNull HttpServletResponse resp)
throws IOException {
resp.setContentType("application/json");
resp.setCharacterEncoding(StandardCharsets.UTF_8.name());
PrintWriter out = resp.getWriter();
Gson gson = new Gson();
out.println(gson.toJson(Data.getFiles()));
out.print(gson.toJson(Data.getFiles()));
}
}

View File

@ -2,11 +2,20 @@ package de.hsel.spm.baudas.web;
import lombok.AllArgsConstructor;
import lombok.Getter;
import lombok.ToString;
import java.util.UUID;
/**
* meta data about file.
*
* @author Johannes Theiner
* @version 0.1
* @since 0.1
*/
@Getter
@AllArgsConstructor
@ToString
public class SavedFile {
private UUID uuid;

View File

@ -29,8 +29,19 @@ import java.nio.file.StandardCopyOption;
@MultipartConfig
public class Upload extends HttpServlet {
private static final long serialVersionUID = 14144111845151L;
/**
* doPost.
*
* @param req request
* @param resp response
* @throws ServletException could not get file part
* @throws IOException writer could not be retrieved
*/
@Override
protected void doPost(@NotNull HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
protected void doPost(@NotNull HttpServletRequest req, HttpServletResponse resp)
throws ServletException, IOException {
req.setCharacterEncoding(StandardCharsets.UTF_8.name());
Part filePart = req.getPart("file");
@ -39,13 +50,12 @@ public class Upload extends HttpServlet {
Path path = Data.add(fileName);
System.out.println(path);
if (!Files.exists(path)) {
Files.createFile(path);
}
Files.copy(inputStream, path, StandardCopyOption.REPLACE_EXISTING);
resp.sendRedirect("files");
resp.sendRedirect("index.jsf");
}
}