Faster INPX parse

src/main/java/ru/redrise/marinesco/ThreadPoolTaskExecutorSettings.java

@@ -0,0 +1,19 @@
+package ru.redrise.marinesco;
+
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.core.task.TaskExecutor;
+import org.springframework.scheduling.concurrent.ThreadPoolTaskExecutor;
+
+@Configuration
+public class ThreadPoolTaskExecutorSettings {
+    @Bean
+    public TaskExecutor configTaskExecutor(){
+        final ThreadPoolTaskExecutor executor = new ThreadPoolTaskExecutor();
+        executor.setCorePoolSize(8);
+        executor.setMaxPoolSize(16);
+        //executor.setQueueCapacity(50);
+
+        return executor;
+    }
+}

src/main/java/ru/redrise/marinesco/data/AuthorRepository.java

@@ -2,18 +2,14 @@ package ru.redrise.marinesco.data;
 
 import java.util.Optional;
 
-import org.springframework.data.repository.CrudRepository;
+import org.springframework.data.jpa.repository.JpaRepository;
 import org.springframework.stereotype.Repository;
 
 import ru.redrise.marinesco.library.Author;
 import java.util.List;
 
-
-
-
-
 @Repository
-public interface AuthorRepository extends CrudRepository<Author, Long>{  
+public interface AuthorRepository extends JpaRepository<Author, Long>{  
     Optional<Author> findByAuthorName(String authorName);
     List<Author> findByAuthorNameContainingIgnoreCase(String authorName);
 }

src/main/java/ru/redrise/marinesco/data/BookRepository.java

@@ -2,7 +2,7 @@ package ru.redrise.marinesco.data;
 
 import java.util.List;
 
-import org.springframework.data.repository.CrudRepository;
+import org.springframework.data.jpa.repository.JpaRepository;
 import org.springframework.stereotype.Repository;
 
 import ru.redrise.marinesco.library.Author;
@@ -12,7 +12,7 @@ import ru.redrise.marinesco.library.Book;
 
 
 @Repository
-public interface BookRepository extends CrudRepository<Book, Integer>{   
+public interface BookRepository extends JpaRepository<Book, Integer>{   
     List<Book> findBySeriesContainingIgnoreCase(String title);
     List<Book> findByTitleContainingIgnoreCase(String title);
 

src/main/java/ru/redrise/marinesco/data/GenreRepository.java

@@ -1,11 +1,11 @@
 package ru.redrise.marinesco.data;
 
-import org.springframework.data.repository.CrudRepository;
+import org.springframework.data.jpa.repository.JpaRepository;
 import org.springframework.stereotype.Repository;
 
 import ru.redrise.marinesco.library.Genre;
 
 
 @Repository
-public interface GenreRepository extends CrudRepository<Genre, String>{   
+public interface GenreRepository extends JpaRepository<Genre, String>{   
 }

src/main/java/ru/redrise/marinesco/library/Author.java

@@ -1,9 +1,6 @@
 package ru.redrise.marinesco.library;
 
-import jakarta.persistence.Column;
 import jakarta.persistence.Entity;
-import jakarta.persistence.GeneratedValue;
-import jakarta.persistence.GenerationType;
 import jakarta.persistence.Id;
 import lombok.AccessLevel;
 import lombok.Data;
@@ -13,16 +10,12 @@ import lombok.NoArgsConstructor;
 @Entity
 @NoArgsConstructor(access = AccessLevel.PRIVATE, force = true)
 public class Author {
-//    private static final long serialVersionUID = 1L;
-    
     @Id
-    @GeneratedValue(strategy = GenerationType.AUTO)
     private Long id;
-
-    @Column(unique=true)
     private String authorName;
 
     public Author(String name){
         this.authorName = name;
+        this.id = (long) name.hashCode();
     }
 }

src/main/java/ru/redrise/marinesco/library/Book.java

@@ -4,6 +4,7 @@ import java.nio.charset.StandardCharsets;
 import java.time.LocalDate;
 import java.util.ArrayList;
 import java.util.List;
+import java.util.Set;
 
 import jakarta.persistence.Entity;
 import jakarta.persistence.Id;
@@ -14,8 +15,6 @@ import lombok.Data;
 import lombok.NoArgsConstructor;
 import lombok.extern.slf4j.Slf4j;
 import ru.redrise.marinesco.RainbowDump;
-import ru.redrise.marinesco.data.AuthorRepository;
-import ru.redrise.marinesco.data.GenreRepository;
 
 @Slf4j
 @Entity
@@ -50,8 +49,8 @@ public class Book {
 
     public Book(byte[] line,
             String container,
-            AuthorRepository authorRepository,
-            GenreRepository genreRepository,
+            Set<Author> authorsCollection,
+            Set<Genre> genresCollection,
             Long libraryId,
             String libraryVersion) throws Exception {
         // AUTHOR;GENRE;TITLE;SERIES;SERNO;FILE;SIZE;LIBID;DEL;EXT;DATE;
@@ -62,8 +61,8 @@ public class Book {
         this.container = container + ".zip";
         this.authors = new ArrayList<>();
         this.genres = new ArrayList<>();
-        parseAuthors(authorRepository);
-        parseGenere(genreRepository);
+        parseAuthors(authorsCollection);
+        parseGenere(genresCollection);
         this.title = parseNextString();
         this.series = parseNextString();
         this.serNo = parseNextString();
@@ -96,7 +95,7 @@ public class Book {
          */
     }
 
-    private void parseAuthors(AuthorRepository authorRepository) throws Exception {
+    private void parseAuthors(Set<Author> authorsCollection) throws Exception {
         for (; position < line.length; position++) {
             if (line[position] == 0x04) {
                 String allAuthors = new String(line, 0, position, StandardCharsets.UTF_8);
@@ -104,8 +103,9 @@ public class Book {
                 for (String authorName : allAuthors.split(":")) {
                     authorName = authorName.replaceAll(",", " ").trim();
                     if (!authorName.equals("")) {
-                        Author author = authorRepository.findByAuthorName(authorName).orElse(new Author(authorName));
-                        authors.add(authorRepository.save(author));
+                        Author author = new Author(authorName);
+                        authorsCollection.add(author);
+                        authors.add(author);
                     }
                 }
 
@@ -117,14 +117,15 @@ public class Book {
         throw new Exception("Invalid 'inp' file format (parse Authors)");
     }
 
-    private void parseGenere(GenreRepository genreRepository) throws Exception {
+    private void parseGenere(Set<Genre> genresCollection) throws Exception {
         for (int i = position; i < line.length; i++) {
             if (line[i] == 0x04) {
                 String allGenres = new String(line, position, i - position, StandardCharsets.UTF_8);
 
                 for (String genreName : allGenres.split(":")) {
                     Genre genre = new Genre(genreName);
-                    genres.add(genreRepository.save(genre));
+                    genresCollection.add(genre);
+                    genres.add(genre);
                 }
 
                 position = i + 1;

src/main/java/ru/redrise/marinesco/library/InpxLibraryMetadataScanner.java

@@ -0,0 +1,47 @@
+package ru.redrise.marinesco.library;
+
+import java.io.File;
+import java.io.FileInputStream;
+import java.nio.charset.StandardCharsets;
+import java.util.zip.ZipEntry;
+import java.util.zip.ZipInputStream;
+
+import ru.redrise.marinesco.data.LibraryMetadataRepository;
+
+public class InpxLibraryMetadataScanner {
+    private InpxLibraryMetadataScanner() { }
+
+    public static LibraryMetadata saveFromFile(File inpxFile, LibraryMetadataRepository repository) throws Exception {
+        LibraryMetadata libraryMetadata = new LibraryMetadata();
+
+        try (ZipInputStream zipInputStream = new ZipInputStream(new FileInputStream(inpxFile))) {
+            ZipEntry zipEntry;
+            
+            while ((zipEntry = zipInputStream.getNextEntry()) != null) {
+                if (isCollection(zipEntry))
+                    libraryMetadata.setCollectionInfo(readPlainText(zipInputStream));
+                else if (isVersion(zipEntry))
+                    libraryMetadata.setVersionInfo(readPlainText(zipInputStream));
+            }
+        }
+
+        return repository.save(libraryMetadata);
+    }
+
+    private static boolean isCollection(ZipEntry zipEntry) {
+        return zipEntry.getName().toLowerCase().contains("collection.info");
+    }
+
+    private static boolean isVersion(ZipEntry zipEntry){
+        return zipEntry.getName().toLowerCase().contains("version.info");
+    }
+
+    private static String readPlainText(ZipInputStream zipInputStream) throws Exception {
+        byte[] content = new byte[1024];
+        StringBuilder stringBuilder = new StringBuilder();
+        while (zipInputStream.read(content) > 0)
+            stringBuilder.append(new String(content, StandardCharsets.UTF_8));
+
+        return stringBuilder.toString();
+    }
+}

src/main/java/ru/redrise/marinesco/library/InpxScanner.java

@@ -3,12 +3,21 @@ package ru.redrise.marinesco.library;
 import java.io.File;
 import java.io.FileInputStream;
 import java.nio.ByteBuffer;
-import java.nio.charset.StandardCharsets;
+import java.time.LocalDateTime;
+import java.time.format.DateTimeFormatter;
+import java.time.temporal.ChronoUnit;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
 import java.util.stream.Stream;
 import java.util.zip.ZipEntry;
 import java.util.zip.ZipInputStream;
 
 import org.springframework.core.io.FileSystemResource;
+import org.springframework.core.task.TaskExecutor;
 import org.springframework.stereotype.Component;
 
 import lombok.extern.slf4j.Slf4j;
@@ -20,12 +29,11 @@ import ru.redrise.marinesco.settings.ApplicationSettings;
 
 @Slf4j
 @Component
-public class InpxScanner implements Runnable {
+public class InpxScanner {
+    private static volatile String lastRunErrors = "";
+    private static LocalDateTime lastRunTime = LocalDateTime.of(1970, 01, 01, 0, 0, 0);
 
-    private static volatile Thread parser;
-    private static volatile String lastRunErrors;
-
-    private LibraryMetadata libraryMetadata;
+    private TaskExecutor executor;
     private LibraryMetadataRepository libraryMetadataRepository;
     private AuthorRepository authorRepository;
     private GenreRepository genreRepository;
@@ -33,11 +41,13 @@ public class InpxScanner implements Runnable {
 
     private String filesLocation;
 
-    public InpxScanner(ApplicationSettings applicationSettings,
+    public InpxScanner(TaskExecutor executor,
+            ApplicationSettings applicationSettings,
             AuthorRepository authorRepository,
             GenreRepository genreRepository,
             BookRepository bookRepository,
             LibraryMetadataRepository libraryMetadataRepository) {
+        this.executor = executor;
         this.filesLocation = applicationSettings.getFilesLocation();
         this.authorRepository = authorRepository;
         this.genreRepository = genreRepository;
@@ -46,67 +56,70 @@ public class InpxScanner implements Runnable {
     }
 
     /*
-     * @return true if executed, false if already running
+     * @return true if executed, false otherwise
      */
     public boolean reScan() {
-        if (parser == null || !parser.isAlive()) {
-            parser = new Thread(this);
-            parser.start();
-            return true;
-        }
+
+        LocalDateTime currentDateTime = LocalDateTime.now();
+
+        if (ChronoUnit.MINUTES.between(lastRunTime, currentDateTime) < 5) {
+            lastRunErrors = "Too frequent requests. Please whait 5 min. Last attmpt: "
+                    + lastRunTime.format(DateTimeFormatter.ofPattern("DD.MM.YYYY HH:mm:ss"));
             return false;
         }
+        lastRunTime = currentDateTime;
+        lastRunErrors = "";
 
-    @Override
-    public void run() {
+        Thread scanThread = new Thread(() -> {
             try {
-            final FileSystemResource libraryLocation = new FileSystemResource(filesLocation);
+                File inpxFile = getInpxFile();
+                log.debug("INPX file found: " + inpxFile.getName());
 
-            final File inpxFile = Stream.of(libraryLocation.getFile().listFiles())
+                LibraryMetadata libMetadata = InpxLibraryMetadataScanner.saveFromFile(inpxFile,
+                        libraryMetadataRepository);
+
+                Long libId = libMetadata.getId();
+                String libVersion = libMetadata.getVersion();
+                HashMap<String, byte[]> inpEntries = collectInp(inpxFile);
+
+                for (Map.Entry<String, byte[]> entry : inpEntries.entrySet())
+                    executor.execute(new InpxWorker(entry, libId, libVersion));
+            } catch (Exception e) {
+                log.error("{}", e);
+                lastRunErrors = lastRunErrors + " " + e.getMessage();
+            }
+        });
+
+        scanThread.start();
+
+        return true;
+    }
+
+    private File getInpxFile() throws Exception {
+        final FileSystemResource libraryLocation = new FileSystemResource(filesLocation);
+        return Stream.of(libraryLocation.getFile().listFiles())
                 .filter(file -> file.getName().endsWith(".inpx"))
                 .findFirst()
                 .get();
-
-            log.debug("INPX file found as " + inpxFile.getName());
-
-            getLibraryMetadata(inpxFile);
-            parseInp(inpxFile);
-            // Once multiple libraries imlemented, add here 'delete recrodds with old
-            // version of the library'
-            // TODO: fix lirary ID changes on every update: add selector on the front
-        } catch (Exception e) {
-            log.error("{}", e);
-            InpxScanner.lastRunErrors = e.getMessage();
-        }
     }
 
-    private void getLibraryMetadata(File inpxFile) throws Exception {
-        libraryMetadata = new LibraryMetadata();
-
+    private HashMap<String, byte[]> collectInp(File inpxFile) throws Exception {
+        final HashMap<String, byte[]> inpEntries = new HashMap<>();
         try (ZipInputStream zipInputStream = new ZipInputStream(new FileInputStream(inpxFile))) {
-            ZipEntry zipEntry = zipInputStream.getNextEntry();
-
-            while (zipEntry != null) {
-                if (zipEntry.getName().toLowerCase().contains("collection.info"))
-                    libraryMetadata.setCollectionInfo(readPlainText(zipInputStream));
-
-                else if (zipEntry.getName().toLowerCase().contains("version.info"))
-                    libraryMetadata.setVersionInfo(readPlainText(zipInputStream));
-
-                zipEntry = zipInputStream.getNextEntry();
+            ZipEntry zipEntry;
+            while ((zipEntry = zipInputStream.getNextEntry()) != null) {
+                if (isInp(zipEntry)) {
+                    String zipEntryName = zipEntry.getName();
+                    zipEntryName = zipEntryName.substring(0, zipEntryName.lastIndexOf('.'));
+                    inpEntries.put(zipEntryName, inpToByteArray(zipInputStream, zipEntry.getSize()));
                 }
             }
-
-        libraryMetadata = libraryMetadataRepository.save(libraryMetadata);
+        }
+        return inpEntries;
     }
 
-    private String readPlainText(ZipInputStream zipInputStream) throws Exception {
-        byte[] content = new byte[1024];
-        StringBuilder stringBuilder = new StringBuilder();
-        while (zipInputStream.read(content) > 0)
-            stringBuilder.append(new String(content, StandardCharsets.UTF_8));
-
-        return stringBuilder.toString();
+    private boolean isInp(ZipEntry zipEntry) {
+        return zipEntry.getName().toLowerCase().endsWith(".inp");
     }
 
     private byte[] inpToByteArray(ZipInputStream stream, long fileSize) throws Exception {
@@ -133,51 +146,50 @@ public class InpxScanner implements Runnable {
         return inpByteBuffer.array();
     }
 
-    private void parseInp(File inpxFile) throws Exception {
-        /*
-        log.warn("REMOVE TEMPORARY SOLUTION - BREAKER");
-        log.warn("REMOVE TEMPORARY SOLUTION - BREAKER");
-        log.warn("REMOVE TEMPORARY SOLUTION - BREAKER");
-        boolean breaker = false;
-        */
-        try (ZipInputStream zipInputStream = new ZipInputStream(new FileInputStream(inpxFile))) {
-            ZipEntry zipEntry = zipInputStream.getNextEntry();
-
-            while (zipEntry != null) {
-                if (zipEntry.getName().toLowerCase().endsWith(".inp")) {
-                    /*
-                    if (breaker) {
-                        zipEntry = zipInputStream.getNextEntry();
-                        continue;
-                    }
-                    breaker = true;
-                    // */
-                    byte[] content = inpToByteArray(zipInputStream, zipEntry.getSize());
-                    parseInpContent(content, zipEntry.getName());
-                }
-                zipEntry = zipInputStream.getNextEntry();
-            }
-        }
+    private boolean isNextCarriageReturn(int i, byte[] content) {
+        return i + 1 < content.length && (content[i + 1] == '\r');
     }
 
-    private void parseInpContent(byte[] content, String name) throws Exception {
-        name = name.substring(0, name.lastIndexOf('.'));
+    public static String getLastRunErrors() {
+        return lastRunErrors;
+    }
 
+    private class InpxWorker implements Runnable {
+
+        private Long libraryId;
+        private String libraryVersion;
+        private String name;
+        private byte[] content;
+
+        private InpxWorker(Map.Entry<String, byte[]> entry,
+                Long libraryId,
+                String libraryVersion) {
+            this.libraryId = libraryId;
+            this.libraryVersion = libraryVersion;
+            this.name = entry.getKey();
+            this.content = entry.getValue();
+        }
+
+        @Override
+        public void run() {
+            final List<Book> books = new ArrayList<>();
+            final Set<Author> authors = new HashSet<>();
+            final Set<Genre> genres = new HashSet<>();
+            try {
                 log.info("FILE RELATED " + name);
+
                 int lastIndex = 0;
                 for (int i = 0; i < content.length; i++) {
                     if (content[i] == '\n') {
                         byte[] line = new byte[i - lastIndex];
                         System.arraycopy(content, lastIndex, line, 0, i - lastIndex - 1);
 
-                Book book = new Book(line,
+                        books.add(new Book(line,
                                 name,
-                        authorRepository,
-                        genreRepository,
-                        libraryMetadata.getId(),
-                        libraryMetadata.getVersion());
-
-                bookRepository.save(book);
+                                authors,
+                                genres,
+                                libraryId,
+                                libraryVersion));
 
                         if (isNextCarriageReturn(i, content)) {
                             i += 2;
@@ -186,13 +198,18 @@ public class InpxScanner implements Runnable {
                             lastIndex = ++i;
                     }
                 }
+                saveAll(books, authors, genres);
+            } catch (Exception e) {
+                log.error("{}", e);
+                lastRunErrors = lastRunErrors + " " + e.getMessage();
+            }
+        }
     }
 
-    private boolean isNextCarriageReturn(int i, byte[] content) {
-        return i + 1 < content.length && (content[i + 1] == '\r');
-    }
-
-    public static String getLastRunErrors() {
-        return lastRunErrors;
+    /* REMINDER: DO NOT PUT THIS SHIT INTO THREAD */
+    private synchronized void saveAll(List<Book> books, Set<Author> authors, Set<Genre> genres) {
+        authorRepository.saveAll(authors);
+        genreRepository.saveAll(genres);
+        bookRepository.saveAll(books);
     }
 }

src/main/java/ru/redrise/marinesco/settings/SettingsController.java

@@ -37,7 +37,7 @@ public class SettingsController {
     
     @ModelAttribute(name = "lastScanErrors")
     public String setLastRunErrors(){
-        if (InpxScanner.getLastRunErrors() != null)
+        if (InpxScanner.getLastRunErrors() != "")
             return "Last run attempt failed: "+InpxScanner.getLastRunErrors();
         return null;
     }
@@ -56,7 +56,7 @@ public class SettingsController {
         if (inpxScanner.reScan())
             redirectAttributes.addAttribute("rescanOk", "Rescan started");
         else
-            redirectAttributes.addAttribute("rescanError", "Rescan is currently in progress");
+            redirectAttributes.addAttribute("rescanError", "Rescan could be currently in progress");
 
         return redirectView;
     }

src/main/resources/application.yml

@@ -5,16 +5,18 @@ spring:
         driver-class-name: org.h2.Driver  
         generate-unique-name: false
         name: marinesco
-#        url: jdbc:h2:mem:marinesco
-        url: jdbc:h2:file:/tmp/h2
+        url: jdbc:h2:mem:marinesco
+#        url: jdbc:h2:file:/tmp/h2
         username: sa
         password:
     jpa:
         properties:
             hibernate:
                 database-platform: org.hibernate.dialect.H2Dialect
+#                format_sql: true
         hibernate: 
             ddl-auto: update
+#        show-sql: true
     h2:
         console:
             enabled: true

src/main/resources/templates/search.html

@@ -13,7 +13,6 @@
         <div th:replace="~{fragments/header :: ${#authorization.expression('isAuthenticated()')} ? 'header-auth' : 'header-anon'}"></div>
         <div class="container base">
             <div th:if="${books} != null">
-                <hr>
                 <h3>Titles</h3>
                 <div th:each="book : ${books}">
                     <a th:href="${'/book/' + book.id}">