chore: import upstream snapshot with attribution

docs-website/docs/pipeline-components/embedders/vertexaidocumentembedder.mdx

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+---
+title: "VertexAIDocumentEmbedder"
+id: vertexaidocumentembedder
+slug: "/vertexaidocumentembedder"
+description: "This component computes embeddings for documents using models through VertexAI Embeddings API."
+---
+
+# VertexAIDocumentEmbedder
+
+This component computes embeddings for documents using models through VertexAI Embeddings API.
+
+:::warning[Deprecation Notice]
+
+This integration uses the deprecated google-generativeai SDK, which will lose support after August 2025.
+
+We recommend switching to the new [GoogleGenAIDocumentEmbedder](googlegenaidocumentembedder.mdx) integration instead.
+:::
+
+<div className="key-value-table">
+
+|  |  |
+| --- | --- |
+| **Most common position in a pipeline** | Before a [DocumentWriter](../writers/documentwriter.mdx) in an indexing pipeline                           |
+| **Mandatory init variables**           | `model`: The model used through the VertexAI Embeddings API                                     |
+| **Mandatory run variables**            | `documents`: A list of documents to be embedded                                                 |
+| **Output variables**                   | `documents`: A list of documents enriched with embeddings                                       |
+| **API reference**                      | [Google Vertex](/reference/integrations-google-vertex)                                                 |
+| **GitHub link**                        | https://github.com/deepset-ai/haystack-core-integrations/tree/main/integrations/google_vertex |
+| **Package name** | `google-vertex-haystack` |
+
+</div>
+
+`VertexAIDocumentEmbedder` enriches the metadata of documents with an embedding of their content. To embed a string, use the [`VertexAITextEmbedder`](vertexaitextembedder.mdx).
+
+To use the `VertexAIDocumentEmbedder`, initialize it with:
+
+- `model`: The supported models are:
+  - "text-embedding-004"
+  - "text-embedding-005"
+  - "textembedding-gecko-multilingual@001"
+  - "text-multilingual-embedding-002"
+  - "text-embedding-large-exp-03-07"
+- `task_type`: "RETRIEVAL_DOCUMENT” is the default. You can find all task types in the official [Google documentation](https://cloud.google.com/vertex-ai/generative-ai/docs/model-reference/text-embeddings-api#tasktype).
+
+### Authentication
+
+`VertexAIDocumentEmbedder` uses Google Cloud Application Default Credentials (ADCs) for authentication. For more information on how to set up ADCs, see the [official documentation](https://cloud.google.com/docs/authentication/provide-credentials-adc).
+
+Keep in mind that it’s essential to use an account that has access to a project authorized to use Google Vertex AI endpoints.
+
+You can find your project ID in the [GCP resource manager](https://console.cloud.google.com/cloud-resource-manager) or locally by running `gcloud projects list` in your terminal. For more info on the gcloud CLI, see its [official documentation](https://cloud.google.com/cli).
+
+## Usage
+
+Install the `google-vertex-haystack` package to use this Embedder:
+
+```shell
+pip install google-vertex-haystack
+```
+
+### On its own
+
+```python
+from haystack import Document
+from haystack_integrations.components.embedders.google_vertex import (
+    VertexAIDocumentEmbedder,
+)
+
+doc = Document(content="I love pizza!")
+
+document_embedder = VertexAIDocumentEmbedder(model="text-embedding-005")
+
+result = document_embedder.run([doc])
+print(result["documents"][0].embedding)
+# [-0.044606007635593414, 0.02857724390923977, -0.03549133986234665,
+```
+
+### In a pipeline
+
+```python
+from haystack import Document
+from haystack import Pipeline
+from haystack.document_stores.in_memory import InMemoryDocumentStore
+from haystack_integrations.components.embedders.google_vertex import (
+    VertexAITextEmbedder,
+)
+from haystack_integrations.components.embedders.google_vertex import (
+    VertexAIDocumentEmbedder,
+)
+from haystack.components.retrievers.in_memory import InMemoryEmbeddingRetriever
+
+document_store = InMemoryDocumentStore(embedding_similarity_function="cosine")
+
+documents = [
+    Document(content="My name is Wolfgang and I live in Berlin"),
+    Document(content="I saw a black horse running"),
+    Document(content="Germany has many big cities"),
+]
+
+document_embedder = VertexAIDocumentEmbedder(model="text-embedding-005")
+documents_with_embeddings = document_embedder.run(documents)["documents"]
+document_store.write_documents(documents_with_embeddings)
+
+query_pipeline = Pipeline()
+query_pipeline.add_component(
+    "text_embedder",
+    VertexAITextEmbedder(model="text-embedding-005"),
+)
+query_pipeline.add_component(
+    "retriever",
+    InMemoryEmbeddingRetriever(document_store=document_store),
+)
+query_pipeline.connect("text_embedder.embedding", "retriever.query_embedding")
+
+query = "Who lives in Berlin?"
+
+result = query_pipeline.run({"text_embedder": {"text": query}})
+
+print(result["retriever"]["documents"][0])
+
+# Document(id=..., content: 'My name is Wolfgang and I live in Berlin')
+```