embedding nv2

src/main/java/at/procon/dip/DocumentIntelligencePlatformApplication.java

@@ -18,8 +18,8 @@ import org.springframework.scheduling.annotation.EnableAsync;
 @SpringBootApplication(scanBasePackages = {"at.procon.dip", "at.procon.ted"})
 @EnableAsync
 //@EnableConfigurationProperties(TedProcessorProperties.class)
-@EntityScan(basePackages = {"at.procon.ted.model.entity", "at.procon.dip.domain.document.entity", "at.procon.dip.domain.tenant.entity", "at.procon.dip.domain.ted.entity"})
-@EnableJpaRepositories(basePackages = {"at.procon.ted.repository", "at.procon.dip.domain.document.repository", "at.procon.dip.domain.tenant.repository", "at.procon.dip.domain.ted.repository"})
+@EntityScan(basePackages = {"at.procon.ted.model.entity", "at.procon.dip.domain.document.entity", "at.procon.dip.domain.tenant.entity", "at.procon.dip.domain.ted.entity", "at.procon.dip.embedding.job.entity"})
+@EnableJpaRepositories(basePackages = {"at.procon.ted.repository", "at.procon.dip.domain.document.repository", "at.procon.dip.domain.tenant.repository", "at.procon.dip.domain.ted.repository", "at.procon.dip.embedding.job.repository"})
 public class DocumentIntelligencePlatformApplication {
 
     public static void main(String[] args) {

src/main/java/at/procon/dip/embedding/config/EmbeddingProperties.java

@@ -18,6 +18,8 @@ public class EmbeddingProperties {
     private String defaultQueryModel;
     private Map<String, ProviderProperties> providers = new LinkedHashMap<>();
     private Map<String, ModelProperties> models = new LinkedHashMap<>();
+    private IndexingProperties indexing = new IndexingProperties();
+    private JobsProperties jobs = new JobsProperties();
 
     @Data
     public static class ProviderProperties {
@@ -41,4 +43,24 @@ public class EmbeddingProperties {
         private Integer maxInputChars;
         private boolean active = true;
     }
+
+    @Data
+    public static class IndexingProperties {
+        private boolean embedSemanticText = true;
+        private boolean embedTitleAbstract = true;
+        private boolean embedChunks = true;
+        private boolean embedFulltext = false;
+        private boolean embedSummary = false;
+        private int chunkMinLength = 300;
+        private int fallbackMaxInputChars = 8192;
+    }
+
+    @Data
+    public static class JobsProperties {
+        private boolean enabled = false;
+        private int batchSize = 16;
+        private int maxRetries = 5;
+        private Duration initialRetryDelay = Duration.ofSeconds(30);
+        private Duration maxRetryDelay = Duration.ofHours(6);
+    }
 }

src/main/java/at/procon/dip/embedding/job/entity/EmbeddingJob.java

@@ -0,0 +1,96 @@
+package at.procon.dip.embedding.job.entity;
+
+import at.procon.dip.architecture.SchemaNames;
+import at.procon.dip.embedding.model.EmbeddingJobStatus;
+import at.procon.dip.embedding.model.EmbeddingJobType;
+import jakarta.persistence.Column;
+import jakarta.persistence.Entity;
+import jakarta.persistence.EnumType;
+import jakarta.persistence.Enumerated;
+import jakarta.persistence.GeneratedValue;
+import jakarta.persistence.GenerationType;
+import jakarta.persistence.Id;
+import jakarta.persistence.Index;
+import jakarta.persistence.PrePersist;
+import jakarta.persistence.PreUpdate;
+import jakarta.persistence.Table;
+import java.time.OffsetDateTime;
+import java.util.UUID;
+import lombok.AllArgsConstructor;
+import lombok.Builder;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+import lombok.Setter;
+
+@Entity
+@Table(schema = SchemaNames.DOC, name = "doc_embedding_job", indexes = {
+        @Index(name = "idx_doc_embedding_job_status_next_retry", columnList = "status,next_retry_at"),
+        @Index(name = "idx_doc_embedding_job_representation", columnList = "representation_id"),
+        @Index(name = "idx_doc_embedding_job_document", columnList = "document_id"),
+        @Index(name = "idx_doc_embedding_job_model_key", columnList = "model_key")
+})
+@Getter
+@Setter
+@NoArgsConstructor
+@AllArgsConstructor
+@Builder
+public class EmbeddingJob {
+
+    @Id
+    @GeneratedValue(strategy = GenerationType.UUID)
+    private UUID id;
+
+    @Column(name = "document_id", nullable = false)
+    private UUID documentId;
+
+    @Column(name = "representation_id", nullable = false)
+    private UUID representationId;
+
+    @Column(name = "model_key", nullable = false, length = 255)
+    private String modelKey;
+
+    @Enumerated(EnumType.STRING)
+    @Column(name = "job_type", nullable = false, length = 32)
+    private EmbeddingJobType jobType;
+
+    @Enumerated(EnumType.STRING)
+    @Column(name = "status", nullable = false, length = 32)
+    @Builder.Default
+    private EmbeddingJobStatus status = EmbeddingJobStatus.PENDING;
+
+    @Column(name = "attempt_count", nullable = false)
+    @Builder.Default
+    private int attemptCount = 0;
+
+    @Column(name = "next_retry_at")
+    private OffsetDateTime nextRetryAt;
+
+    @Column(name = "priority", nullable = false)
+    @Builder.Default
+    private int priority = 0;
+
+    @Column(name = "provider_request_id", length = 255)
+    private String providerRequestId;
+
+    @Column(name = "last_error", columnDefinition = "TEXT")
+    private String lastError;
+
+    @Column(name = "created_at", nullable = false, updatable = false)
+    @Builder.Default
+    private OffsetDateTime createdAt = OffsetDateTime.now();
+
+    @Column(name = "updated_at", nullable = false)
+    @Builder.Default
+    private OffsetDateTime updatedAt = OffsetDateTime.now();
+
+    @PrePersist
+    protected void onCreate() {
+        createdAt = OffsetDateTime.now();
+        updatedAt = OffsetDateTime.now();
+    }
+
+    @PreUpdate
+    protected void onUpdate() {
+        updatedAt = OffsetDateTime.now();
+    }
+}

src/main/java/at/procon/dip/embedding/job/repository/EmbeddingJobRepository.java

@@ -0,0 +1,33 @@
+package at.procon.dip.embedding.job.repository;
+
+import at.procon.dip.embedding.job.entity.EmbeddingJob;
+import at.procon.dip.embedding.model.EmbeddingJobStatus;
+import at.procon.dip.embedding.model.EmbeddingJobType;
+import jakarta.persistence.LockModeType;
+import java.time.OffsetDateTime;
+import java.util.Collection;
+import java.util.List;
+import java.util.Optional;
+import java.util.UUID;
+import org.springframework.data.domain.Pageable;
+import org.springframework.data.jpa.repository.JpaRepository;
+import org.springframework.data.jpa.repository.Lock;
+import org.springframework.data.jpa.repository.Query;
+import org.springframework.data.repository.query.Param;
+
+public interface EmbeddingJobRepository extends JpaRepository<EmbeddingJob, UUID> {
+
+    Optional<EmbeddingJob> findFirstByRepresentationIdAndModelKeyAndJobTypeAndStatusIn(
+            UUID representationId,
+            String modelKey,
+            EmbeddingJobType jobType,
+            Collection<EmbeddingJobStatus> statuses);
+
+    @Lock(LockModeType.PESSIMISTIC_WRITE)
+    @Query("SELECT j FROM EmbeddingJob j WHERE j.status IN :statuses AND (j.nextRetryAt IS NULL OR j.nextRetryAt <= :now) ORDER BY j.priority DESC, j.createdAt ASC")
+    List<EmbeddingJob> findReadyJobsForUpdate(@Param("statuses") Collection<EmbeddingJobStatus> statuses,
+                                              @Param("now") OffsetDateTime now,
+                                              Pageable pageable);
+
+    List<EmbeddingJob> findByDocumentId(UUID documentId);
+}

src/main/java/at/procon/dip/embedding/job/service/EmbeddingJobService.java

@@ -0,0 +1,116 @@
+package at.procon.dip.embedding.job.service;
+
+import at.procon.dip.embedding.config.EmbeddingProperties;
+import at.procon.dip.embedding.job.entity.EmbeddingJob;
+import at.procon.dip.embedding.job.repository.EmbeddingJobRepository;
+import at.procon.dip.embedding.model.EmbeddingJobStatus;
+import at.procon.dip.embedding.model.EmbeddingJobType;
+import at.procon.dip.embedding.policy.EmbeddingSelectionPolicy;
+import at.procon.dip.embedding.registry.EmbeddingModelRegistry;
+import at.procon.dip.domain.document.entity.DocumentTextRepresentation;
+import java.time.Duration;
+import java.time.OffsetDateTime;
+import java.util.List;
+import java.util.Set;
+import java.util.UUID;
+import lombok.RequiredArgsConstructor;
+import org.springframework.data.domain.PageRequest;
+import org.springframework.stereotype.Service;
+import org.springframework.transaction.annotation.Transactional;
+
+@Service
+@RequiredArgsConstructor
+@Transactional
+public class EmbeddingJobService {
+
+    private static final Set<EmbeddingJobStatus> ACTIVE_STATUSES = Set.of(
+            EmbeddingJobStatus.PENDING,
+            EmbeddingJobStatus.IN_PROGRESS,
+            EmbeddingJobStatus.RETRY_SCHEDULED
+    );
+
+    private final EmbeddingJobRepository jobRepository;
+    private final EmbeddingSelectionPolicy selectionPolicy;
+    private final EmbeddingModelRegistry modelRegistry;
+    private final EmbeddingProperties properties;
+
+    public List<EmbeddingJob> enqueueForDocument(UUID documentId) {
+        return enqueueForDocument(documentId, modelRegistry.getRequiredDefaultDocumentModelKey());
+    }
+
+    public List<EmbeddingJob> enqueueForDocument(UUID documentId, String modelKey) {
+        var model = modelRegistry.getRequired(modelKey);
+        List<DocumentTextRepresentation> selected = selectionPolicy.selectRepresentations(documentId, model);
+        return selected.stream()
+                .map(representation -> enqueueForRepresentation(documentId, representation.getId(), modelKey, EmbeddingJobType.DOCUMENT_EMBED))
+                .toList();
+    }
+
+    public EmbeddingJob enqueueForRepresentation(UUID documentId, UUID representationId, String modelKey, EmbeddingJobType jobType) {
+        return jobRepository.findFirstByRepresentationIdAndModelKeyAndJobTypeAndStatusIn(
+                        representationId,
+                        modelKey,
+                        jobType,
+                        ACTIVE_STATUSES
+                )
+                .orElseGet(() -> jobRepository.save(EmbeddingJob.builder()
+                        .documentId(documentId)
+                        .representationId(representationId)
+                        .modelKey(modelKey)
+                        .jobType(jobType)
+                        .status(EmbeddingJobStatus.PENDING)
+                        .priority(0)
+                        .attemptCount(0)
+                        .build()));
+    }
+
+    public List<EmbeddingJob> claimNextReadyJobs(int limit) {
+        List<EmbeddingJob> jobs = jobRepository.findReadyJobsForUpdate(
+                Set.of(EmbeddingJobStatus.PENDING, EmbeddingJobStatus.RETRY_SCHEDULED),
+                OffsetDateTime.now(),
+                PageRequest.of(0, limit)
+        );
+        jobs.forEach(job -> {
+            job.setStatus(EmbeddingJobStatus.IN_PROGRESS);
+            job.setAttemptCount(job.getAttemptCount() + 1);
+            job.setLastError(null);
+            job.setNextRetryAt(null);
+        });
+        return jobRepository.saveAll(jobs);
+    }
+
+    public EmbeddingJob getRequired(UUID jobId) {
+        return jobRepository.findById(jobId)
+                .orElseThrow(() -> new IllegalArgumentException("Unknown embedding job id: " + jobId));
+    }
+
+    public void markCompleted(UUID jobId, String providerRequestId) {
+        EmbeddingJob job = getRequired(jobId);
+        job.setStatus(EmbeddingJobStatus.DONE);
+        job.setProviderRequestId(providerRequestId);
+        job.setLastError(null);
+        job.setNextRetryAt(null);
+        jobRepository.save(job);
+    }
+
+    public void markFailed(UUID jobId, String errorMessage, boolean retryable) {
+        EmbeddingJob job = getRequired(jobId);
+        job.setLastError(errorMessage);
+        if (retryable && job.getAttemptCount() < properties.getJobs().getMaxRetries()) {
+            job.setStatus(EmbeddingJobStatus.RETRY_SCHEDULED);
+            job.setNextRetryAt(OffsetDateTime.now().plus(nextDelay(job.getAttemptCount())));
+        } else {
+            job.setStatus(EmbeddingJobStatus.FAILED);
+            job.setNextRetryAt(null);
+        }
+        jobRepository.save(job);
+    }
+
+    private Duration nextDelay(int attemptCount) {
+        long factor = Math.max(0, attemptCount - 1);
+        Duration candidate = properties.getJobs().getInitialRetryDelay().multipliedBy(1L << Math.min(factor, 10));
+        return candidate.compareTo(properties.getJobs().getMaxRetryDelay()) > 0
+                ? properties.getJobs().getMaxRetryDelay()
+                : candidate;
+    }
+}

src/main/java/at/procon/dip/embedding/model/EmbeddingJobStatus.java

@@ -0,0 +1,9 @@
+package at.procon.dip.embedding.model;
+
+public enum EmbeddingJobStatus {
+    PENDING,
+    IN_PROGRESS,
+    DONE,
+    FAILED,
+    RETRY_SCHEDULED
+}

src/main/java/at/procon/dip/embedding/model/EmbeddingJobType.java

@@ -0,0 +1,7 @@
+package at.procon.dip.embedding.model;
+
+public enum EmbeddingJobType {
+    DOCUMENT_EMBED,
+    QUERY_EMBED,
+    REEMBED
+}

src/main/java/at/procon/dip/embedding/policy/DefaultEmbeddingSelectionPolicy.java

@@ -0,0 +1,68 @@
+package at.procon.dip.embedding.policy;
+
+import at.procon.dip.domain.document.RepresentationType;
+import at.procon.dip.domain.document.entity.DocumentTextRepresentation;
+import at.procon.dip.domain.document.repository.DocumentTextRepresentationRepository;
+import at.procon.dip.embedding.config.EmbeddingProperties;
+import at.procon.dip.embedding.model.EmbeddingModelDescriptor;
+import java.util.ArrayList;
+import java.util.Comparator;
+import java.util.LinkedHashSet;
+import java.util.List;
+import java.util.Set;
+import java.util.UUID;
+import lombok.RequiredArgsConstructor;
+import org.springframework.stereotype.Component;
+
+@Component
+@RequiredArgsConstructor
+public class DefaultEmbeddingSelectionPolicy implements EmbeddingSelectionPolicy {
+
+    private final DocumentTextRepresentationRepository representationRepository;
+    private final EmbeddingProperties embeddingProperties;
+
+    @Override
+    public List<DocumentTextRepresentation> selectRepresentations(UUID documentId, EmbeddingModelDescriptor model) {
+        List<DocumentTextRepresentation> representations = representationRepository.findByDocument_Id(documentId);
+        List<DocumentTextRepresentation> selected = new ArrayList<>();
+        EmbeddingProperties.IndexingProperties indexing = embeddingProperties.getIndexing();
+
+        for (DocumentTextRepresentation representation : representations) {
+            if (include(representation, indexing)) {
+                selected.add(representation);
+            }
+        }
+
+        if (selected.isEmpty()) {
+            representationRepository.findFirstByDocument_IdAndPrimaryRepresentationTrue(documentId)
+                    .ifPresent(selected::add);
+        }
+
+        Set<UUID> seen = new LinkedHashSet<>();
+        return selected.stream()
+                .filter(rep -> seen.add(rep.getId()))
+                .sorted(Comparator
+                        .comparing(DocumentTextRepresentation::isPrimaryRepresentation).reversed()
+                        .thenComparing(rep -> rep.getRepresentationType().ordinal())
+                        .thenComparing(rep -> rep.getChunkIndex() == null ? Integer.MAX_VALUE : rep.getChunkIndex()))
+                .toList();
+    }
+
+    private boolean include(DocumentTextRepresentation representation, EmbeddingProperties.IndexingProperties indexing) {
+        return switch (representation.getRepresentationType()) {
+            case SEMANTIC_TEXT -> indexing.isEmbedSemanticText();
+            case TITLE_ABSTRACT -> indexing.isEmbedTitleAbstract();
+            case CHUNK -> indexing.isEmbedChunks() && effectiveLength(representation) >= indexing.getChunkMinLength();
+            case FULLTEXT -> indexing.isEmbedFulltext();
+            case SUMMARY -> indexing.isEmbedSummary();
+            default -> representation.isPrimaryRepresentation();
+        };
+    }
+
+    private int effectiveLength(DocumentTextRepresentation representation) {
+        if (representation.getCharCount() != null) {
+            return representation.getCharCount();
+        }
+        return representation.getTextBody() == null ? 0 : representation.getTextBody().length();
+    }
+}

src/main/java/at/procon/dip/embedding/policy/EmbeddingSelectionPolicy.java

@@ -0,0 +1,11 @@
+package at.procon.dip.embedding.policy;
+
+import at.procon.dip.domain.document.entity.DocumentTextRepresentation;
+import at.procon.dip.embedding.model.EmbeddingModelDescriptor;
+import java.util.List;
+import java.util.UUID;
+
+public interface EmbeddingSelectionPolicy {
+
+    List<DocumentTextRepresentation> selectRepresentations(UUID documentId, EmbeddingModelDescriptor model);
+}

src/main/java/at/procon/dip/embedding/service/EmbeddingModelCatalogService.java

@@ -0,0 +1,33 @@
+package at.procon.dip.embedding.service;
+
+import at.procon.dip.domain.document.entity.DocumentEmbeddingModel;
+import at.procon.dip.domain.document.service.DocumentEmbeddingService;
+import at.procon.dip.domain.document.service.command.RegisterEmbeddingModelCommand;
+import at.procon.dip.embedding.model.EmbeddingModelDescriptor;
+import at.procon.dip.embedding.registry.EmbeddingModelRegistry;
+import lombok.RequiredArgsConstructor;
+import org.springframework.stereotype.Service;
+import org.springframework.transaction.annotation.Transactional;
+
+@Service
+@RequiredArgsConstructor
+@Transactional
+public class EmbeddingModelCatalogService {
+
+    private final EmbeddingModelRegistry modelRegistry;
+    private final DocumentEmbeddingService documentEmbeddingService;
+
+    public DocumentEmbeddingModel ensureRegistered(String modelKey) {
+        EmbeddingModelDescriptor descriptor = modelRegistry.getRequired(modelKey);
+        documentEmbeddingService.registerModel(new RegisterEmbeddingModelCommand(
+                descriptor.modelKey(),
+                descriptor.providerConfigKey(),
+                descriptor.providerModelKey(),
+                descriptor.dimensions(),
+                descriptor.distanceMetric(),
+                descriptor.supportsQueryEmbeddingMode(),
+                descriptor.active()
+        ));
+        return documentEmbeddingService.findActiveModelByKey(modelKey);
+    }
+}

src/main/java/at/procon/dip/embedding/service/EmbeddingPersistenceService.java

@@ -0,0 +1,73 @@
+package at.procon.dip.embedding.service;
+
+import at.procon.dip.domain.document.EmbeddingStatus;
+import at.procon.dip.domain.document.entity.DocumentEmbedding;
+import at.procon.dip.domain.document.entity.DocumentEmbeddingModel;
+import at.procon.dip.domain.document.entity.DocumentTextRepresentation;
+import at.procon.dip.domain.document.repository.DocumentEmbeddingRepository;
+import at.procon.dip.domain.document.repository.DocumentTextRepresentationRepository;
+import at.procon.dip.domain.document.service.DocumentEmbeddingService;
+import at.procon.dip.embedding.model.EmbeddingProviderResult;
+import at.procon.dip.embedding.support.EmbeddingVectorCodec;
+import java.time.OffsetDateTime;
+import java.util.UUID;
+import lombok.RequiredArgsConstructor;
+import org.springframework.stereotype.Service;
+import org.springframework.transaction.annotation.Transactional;
+
+@Service
+@RequiredArgsConstructor
+@Transactional
+public class EmbeddingPersistenceService {
+
+    private final DocumentTextRepresentationRepository representationRepository;
+    private final DocumentEmbeddingService documentEmbeddingService;
+    private final DocumentEmbeddingRepository embeddingRepository;
+    private final EmbeddingModelCatalogService modelCatalogService;
+
+    public DocumentEmbedding ensurePending(UUID representationId, String modelKey) {
+        DocumentTextRepresentation representation = representationRepository.findById(representationId)
+                .orElseThrow(() -> new IllegalArgumentException("Unknown representation id: " + representationId));
+        DocumentEmbeddingModel model = modelCatalogService.ensureRegistered(modelKey);
+        return documentEmbeddingService.ensurePendingEmbedding(
+                representation.getDocument().getId(),
+                representation.getId(),
+                model.getId()
+        );
+    }
+
+    public DocumentEmbedding markProcessing(UUID embeddingId) {
+        return documentEmbeddingService.markProcessing(embeddingId);
+    }
+
+    public void saveCompleted(UUID embeddingId, EmbeddingProviderResult result) {
+        if (result.vectors() == null || result.vectors().isEmpty()) {
+            throw new IllegalArgumentException("Embedding provider result contains no vectors");
+        }
+        float[] vector = result.vectors().getFirst();
+        embeddingRepository.updateEmbeddingVector(
+                embeddingId,
+                EmbeddingVectorCodec.toPgVector(vector),
+                result.tokenCount(),
+                vector.length
+        );
+    }
+
+    public void markFailed(UUID embeddingId, String errorMessage) {
+        embeddingRepository.updateEmbeddingStatus(
+                embeddingId,
+                EmbeddingStatus.FAILED,
+                errorMessage,
+                null
+        );
+    }
+
+    public void markSkipped(UUID embeddingId, String reason) {
+        embeddingRepository.updateEmbeddingStatus(
+                embeddingId,
+                EmbeddingStatus.SKIPPED,
+                reason,
+                OffsetDateTime.now()
+        );
+    }
+}

src/main/java/at/procon/dip/embedding/service/RepresentationEmbeddingOrchestrator.java

@@ -0,0 +1,96 @@
+package at.procon.dip.embedding.service;
+
+import at.procon.dip.domain.document.entity.DocumentEmbedding;
+import at.procon.dip.domain.document.entity.DocumentTextRepresentation;
+import at.procon.dip.domain.document.repository.DocumentTextRepresentationRepository;
+import at.procon.dip.embedding.config.EmbeddingProperties;
+import at.procon.dip.embedding.job.entity.EmbeddingJob;
+import at.procon.dip.embedding.job.service.EmbeddingJobService;
+import at.procon.dip.embedding.model.EmbeddingJobType;
+import at.procon.dip.embedding.model.EmbeddingProviderResult;
+import at.procon.dip.embedding.model.EmbeddingUseCase;
+import at.procon.dip.embedding.registry.EmbeddingModelRegistry;
+import java.util.List;
+import java.util.UUID;
+import lombok.RequiredArgsConstructor;
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.stereotype.Service;
+import org.springframework.transaction.annotation.Transactional;
+
+@Service
+@RequiredArgsConstructor
+@Slf4j
+public class RepresentationEmbeddingOrchestrator {
+
+    private final EmbeddingJobService jobService;
+    private final EmbeddingExecutionService executionService;
+    private final EmbeddingPersistenceService persistenceService;
+    private final DocumentTextRepresentationRepository representationRepository;
+    private final EmbeddingModelRegistry modelRegistry;
+    private final EmbeddingProperties embeddingProperties;
+
+    @Transactional
+    public List<EmbeddingJob> enqueueDocument(UUID documentId) {
+        return jobService.enqueueForDocument(documentId);
+    }
+
+    @Transactional
+    public List<EmbeddingJob> enqueueDocument(UUID documentId, String modelKey) {
+        return jobService.enqueueForDocument(documentId, modelKey);
+    }
+
+    @Transactional
+    public EmbeddingJob enqueueRepresentation(UUID documentId, UUID representationId, String modelKey) {
+        return jobService.enqueueForRepresentation(documentId, representationId, modelKey, EmbeddingJobType.DOCUMENT_EMBED);
+    }
+
+    @Transactional
+    public int processNextReadyBatch() {
+        if (!embeddingProperties.isEnabled() || !embeddingProperties.getJobs().isEnabled()) {
+            log.debug("New embedding subsystem jobs are disabled");
+            return 0;
+        }
+
+        List<EmbeddingJob> jobs = jobService.claimNextReadyJobs(embeddingProperties.getJobs().getBatchSize());
+        for (EmbeddingJob job : jobs) {
+            processClaimedJob(job);
+        }
+        return jobs.size();
+    }
+
+    @Transactional
+    public void processClaimedJob(EmbeddingJob job) {
+        DocumentTextRepresentation representation = representationRepository.findById(job.getRepresentationId())
+                .orElseThrow(() -> new IllegalArgumentException("Unknown representation id: " + job.getRepresentationId()));
+
+        String text = representation.getTextBody();
+        if (text == null || text.isBlank()) {
+            jobService.markFailed(job.getId(), "No text representation available", false);
+            return;
+        }
+
+        int maxChars = modelRegistry.getRequired(job.getModelKey()).maxInputChars() != null
+                ? modelRegistry.getRequired(job.getModelKey()).maxInputChars()
+                : embeddingProperties.getIndexing().getFallbackMaxInputChars();
+        if (text.length() > maxChars) {
+            text = text.substring(0, maxChars);
+        }
+
+        DocumentEmbedding embedding = persistenceService.ensurePending(representation.getId(), job.getModelKey());
+        persistenceService.markProcessing(embedding.getId());
+
+        try {
+            EmbeddingProviderResult result = executionService.embedTexts(
+                    job.getModelKey(),
+                    EmbeddingUseCase.DOCUMENT,
+                    List.of(text)
+            );
+            persistenceService.saveCompleted(embedding.getId(), result);
+            jobService.markCompleted(job.getId(), result.providerRequestId());
+        } catch (RuntimeException ex) {
+            persistenceService.markFailed(embedding.getId(), ex.getMessage());
+            jobService.markFailed(job.getId(), ex.getMessage(), true);
+            throw ex;
+        }
+    }
+}

src/main/java/at/procon/dip/embedding/support/EmbeddingVectorCodec.java

@@ -0,0 +1,23 @@
+package at.procon.dip.embedding.support;
+
+public final class EmbeddingVectorCodec {
+
+    private EmbeddingVectorCodec() {
+    }
+
+    public static String toPgVector(float[] vector) {
+        if (vector == null || vector.length == 0) {
+            throw new IllegalArgumentException("Embedding vector must not be null or empty");
+        }
+        StringBuilder builder = new StringBuilder();
+        builder.append('[');
+        for (int i = 0; i < vector.length; i++) {
+            if (i > 0) {
+                builder.append(',');
+            }
+            builder.append(Float.toString(vector[i]));
+        }
+        builder.append(']');
+        return builder.toString();
+    }
+}

src/main/resources/db/migration/V9__doc_nv2_embedding_jobs.sql

@@ -0,0 +1,30 @@
+-- NV2: Parallel embedding subsystem job table
+-- Additive and independent from the legacy/transitional vectorization flow.
+
+CREATE TABLE IF NOT EXISTS DOC.doc_embedding_job (
+    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+    document_id UUID NOT NULL REFERENCES DOC.doc_document(id) ON DELETE CASCADE,
+    representation_id UUID NOT NULL REFERENCES DOC.doc_text_representation(id) ON DELETE CASCADE,
+    model_key VARCHAR(255) NOT NULL,
+    job_type VARCHAR(32) NOT NULL,
+    status VARCHAR(32) NOT NULL DEFAULT 'PENDING',
+    attempt_count INTEGER NOT NULL DEFAULT 0,
+    next_retry_at TIMESTAMP WITH TIME ZONE,
+    priority INTEGER NOT NULL DEFAULT 0,
+    provider_request_id VARCHAR(255),
+    last_error TEXT,
+    created_at TIMESTAMP WITH TIME ZONE NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    updated_at TIMESTAMP WITH TIME ZONE NOT NULL DEFAULT CURRENT_TIMESTAMP
+);
+
+CREATE INDEX IF NOT EXISTS idx_doc_embedding_job_status_next_retry
+    ON DOC.doc_embedding_job(status, next_retry_at);
+
+CREATE INDEX IF NOT EXISTS idx_doc_embedding_job_representation
+    ON DOC.doc_embedding_job(representation_id);
+
+CREATE INDEX IF NOT EXISTS idx_doc_embedding_job_document
+    ON DOC.doc_embedding_job(document_id);
+
+CREATE INDEX IF NOT EXISTS idx_doc_embedding_job_model_key
+    ON DOC.doc_embedding_job(model_key);

src/test/java/at/procon/dip/embedding/policy/DefaultEmbeddingSelectionPolicyTest.java

@@ -0,0 +1,78 @@
+package at.procon.dip.embedding.policy;
+
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.mockito.Mockito.when;
+
+import at.procon.dip.domain.document.RepresentationType;
+import at.procon.dip.domain.document.entity.DocumentTextRepresentation;
+import at.procon.dip.domain.document.repository.DocumentTextRepresentationRepository;
+import at.procon.dip.embedding.config.EmbeddingProperties;
+import at.procon.dip.embedding.model.EmbeddingModelDescriptor;
+import at.procon.dip.domain.document.DistanceMetric;
+import java.util.List;
+import java.util.UUID;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.ExtendWith;
+import org.mockito.Mock;
+import org.mockito.junit.jupiter.MockitoExtension;
+
+@ExtendWith(MockitoExtension.class)
+class DefaultEmbeddingSelectionPolicyTest {
+
+    @Mock
+    private DocumentTextRepresentationRepository representationRepository;
+
+    private DefaultEmbeddingSelectionPolicy policy;
+    private EmbeddingModelDescriptor model;
+
+    @BeforeEach
+    void setUp() {
+        EmbeddingProperties properties = new EmbeddingProperties();
+        properties.getIndexing().setEmbedSemanticText(true);
+        properties.getIndexing().setEmbedTitleAbstract(true);
+        properties.getIndexing().setEmbedChunks(true);
+        properties.getIndexing().setChunkMinLength(20);
+        policy = new DefaultEmbeddingSelectionPolicy(representationRepository, properties);
+        model = new EmbeddingModelDescriptor("mock-search", "mock-provider", "mock-search", 16,
+                DistanceMetric.COSINE, true, false, 4096, true);
+    }
+
+    @Test
+    void should_select_semantic_text_title_and_large_chunks() {
+        UUID documentId = UUID.randomUUID();
+        DocumentTextRepresentation semantic = representation(RepresentationType.SEMANTIC_TEXT, true, null,
+                "semantic text");
+        DocumentTextRepresentation titleAbstract = representation(RepresentationType.TITLE_ABSTRACT, false, null,
+                "title abstract text");
+        DocumentTextRepresentation shortChunk = representation(RepresentationType.CHUNK, false, 0,
+                "too short");
+        DocumentTextRepresentation longChunk = representation(RepresentationType.CHUNK, false, 1,
+                "This is a sufficiently long chunk that should be selected.");
+        when(representationRepository.findByDocument_Id(documentId))
+                .thenReturn(List.of(longChunk, semantic, shortChunk, titleAbstract));
+
+        List<DocumentTextRepresentation> selected = policy.selectRepresentations(documentId, model);
+
+        assertThat(selected)
+                .extracting(DocumentTextRepresentation::getRepresentationType)
+                .containsExactly(RepresentationType.SEMANTIC_TEXT, RepresentationType.TITLE_ABSTRACT, RepresentationType.CHUNK);
+        assertThat(selected)
+                .extracting(DocumentTextRepresentation::getChunkIndex)
+                .containsExactly(null, null, 1);
+    }
+
+    private DocumentTextRepresentation representation(RepresentationType type,
+                                                      boolean primary,
+                                                      Integer chunkIndex,
+                                                      String text) {
+        return DocumentTextRepresentation.builder()
+                .id(UUID.randomUUID())
+                .representationType(type)
+                .primaryRepresentation(primary)
+                .chunkIndex(chunkIndex)
+                .charCount(text.length())
+                .textBody(text)
+                .build();
+    }
+}

src/test/java/at/procon/dip/embedding/service/RepresentationEmbeddingOrchestratorTest.java

@@ -0,0 +1,105 @@
+package at.procon.dip.embedding.service;
+
+import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.ArgumentMatchers.eq;
+import static org.mockito.Mockito.verify;
+import static org.mockito.Mockito.when;
+
+import at.procon.dip.domain.document.entity.Document;
+import at.procon.dip.domain.document.entity.DocumentEmbedding;
+import at.procon.dip.domain.document.entity.DocumentTextRepresentation;
+import at.procon.dip.domain.document.repository.DocumentTextRepresentationRepository;
+import at.procon.dip.embedding.config.EmbeddingProperties;
+import at.procon.dip.embedding.job.entity.EmbeddingJob;
+import at.procon.dip.embedding.job.service.EmbeddingJobService;
+import at.procon.dip.embedding.model.EmbeddingJobStatus;
+import at.procon.dip.embedding.model.EmbeddingJobType;
+import at.procon.dip.embedding.model.EmbeddingModelDescriptor;
+import at.procon.dip.embedding.model.EmbeddingProviderResult;
+import at.procon.dip.embedding.registry.EmbeddingModelRegistry;
+import at.procon.dip.domain.document.DistanceMetric;
+import java.util.List;
+import java.util.UUID;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.ExtendWith;
+import org.mockito.Mock;
+import org.mockito.junit.jupiter.MockitoExtension;
+
+@ExtendWith(MockitoExtension.class)
+class RepresentationEmbeddingOrchestratorTest {
+
+    @Mock
+    private EmbeddingJobService jobService;
+    @Mock
+    private EmbeddingExecutionService executionService;
+    @Mock
+    private EmbeddingPersistenceService persistenceService;
+    @Mock
+    private DocumentTextRepresentationRepository representationRepository;
+    @Mock
+    private EmbeddingModelRegistry modelRegistry;
+
+    private RepresentationEmbeddingOrchestrator orchestrator;
+
+    @BeforeEach
+    void setUp() {
+        EmbeddingProperties properties = new EmbeddingProperties();
+        properties.setEnabled(true);
+        properties.getJobs().setEnabled(true);
+        properties.getJobs().setBatchSize(10);
+        properties.getIndexing().setFallbackMaxInputChars(8192);
+        orchestrator = new RepresentationEmbeddingOrchestrator(
+                jobService,
+                executionService,
+                persistenceService,
+                representationRepository,
+                modelRegistry,
+                properties
+        );
+    }
+
+    @Test
+    void processClaimedJob_should_embed_representation_and_mark_job_completed() {
+        UUID documentId = UUID.randomUUID();
+        UUID representationId = UUID.randomUUID();
+        UUID embeddingId = UUID.randomUUID();
+        EmbeddingJob job = EmbeddingJob.builder()
+                .id(UUID.randomUUID())
+                .documentId(documentId)
+                .representationId(representationId)
+                .modelKey("mock-search")
+                .jobType(EmbeddingJobType.DOCUMENT_EMBED)
+                .status(EmbeddingJobStatus.IN_PROGRESS)
+                .attemptCount(1)
+                .build();
+
+        Document document = Document.builder().id(documentId).build();
+        DocumentTextRepresentation representation = DocumentTextRepresentation.builder()
+                .id(representationId)
+                .document(document)
+                .textBody("District heating optimization strategy")
+                .build();
+        when(representationRepository.findById(representationId)).thenReturn(java.util.Optional.of(representation));
+        when(modelRegistry.getRequired("mock-search"))
+                .thenReturn(new EmbeddingModelDescriptor("mock-search", "mock-provider", "mock-search", 16,
+                        DistanceMetric.COSINE, true, false, 4096, true));
+        when(persistenceService.ensurePending(representationId, "mock-search"))
+                .thenReturn(DocumentEmbedding.builder().id(embeddingId).build());
+        when(executionService.embedTexts(eq("mock-search"), any(), any()))
+                .thenReturn(new EmbeddingProviderResult(
+                        new EmbeddingModelDescriptor("mock-search", "mock-provider", "mock-search", 16,
+                                DistanceMetric.COSINE, true, false, 4096, true),
+                        List.of(new float[]{0.1f, 0.2f}),
+                        List.of(),
+                        "req-1",
+                        12
+                ));
+
+        orchestrator.processClaimedJob(job);
+
+        verify(persistenceService).markProcessing(embeddingId);
+        verify(persistenceService).saveCompleted(eq(embeddingId), any(EmbeddingProviderResult.class));
+        verify(jobService).markCompleted(job.getId(), "req-1");
+    }
+}

src/test/java/at/procon/dip/embedding/support/EmbeddingVectorCodecTest.java

@@ -0,0 +1,14 @@
+package at.procon.dip.embedding.support;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+import org.junit.jupiter.api.Test;
+
+class EmbeddingVectorCodecTest {
+
+    @Test
+    void should_render_pgvector_literal() {
+        String rendered = EmbeddingVectorCodec.toPgVector(new float[]{1.0f, 2.5f, -0.75f});
+        assertThat(rendered).isEqualTo("[1.0,2.5,-0.75]");
+    }
+}