droid-mcp-core/io.droidmcp.core.transport/InProcessTransport

InProcessTransport

class InProcessTransport(registry: ToolRegistry, resources: ResourceRegistry = ResourceRegistry(), prompts: PromptRegistry = PromptRegistry())

Direct, in-process access to a ToolRegistry — no JSON-RPC, no network. Intended for on-device LLMs that call tools straight from the same process. Mirrors the surface an MCP client gets over HttpTransport (tools, resources, prompts) without the protocol envelope.

Constructors

InProcessTransport

constructor(registry: ToolRegistry, resources: ResourceRegistry = ResourceRegistry(), prompts: PromptRegistry = PromptRegistry())

Functions

callTool

suspend fun callTool(name: String, params: Map<String, Any>): ToolResult

Invoke a tool; honours runtime gating and runs on Dispatchers.IO (see ToolRegistry.executeTool).

suspend fun callTool(name: String, params: Map<String, Any>, onProgress: suspend (ProgressUpdate) -> Unit): ToolResult

Like callTool, delivering the tool's reportProgress updates to onProgress.

getPrompt

suspend fun getPrompt(name: String, arguments: Map<String, String> = emptyMap()): PromptResult?

Render the named prompt, or return null when it isn't listed.

listPrompts

fun listPrompts(): List<McpPrompt>

Prompts whose McpPrompt.requiredTools are all enabled, like prompts/list.

listResources

suspend fun listResources(): List<McpResource>

Resources of every provider whose required tools are enabled, like resources/list (unpaginated). Providers run in parallel; one that fails or times out contributes nothing.

listResourceTemplates

fun listResourceTemplates(): List<McpResourceTemplate>

URI templates of every provider whose required tools are enabled, like resources/templates/list.

listTools

fun listTools(): List<McpTool>

The enabled tools as live McpTool instances — tools the host gated off are excluded.

listToolsJson

fun listToolsJson(): String

The enabled tools serialised to a JSON array, each entry carrying name, description, a parameters JSON Schema (type: object with properties and a required list), plus title, outputSchema and annotations when set. For LLM runtimes that want the tool catalogue as a string. Gated-off tools are excluded, matching tools/list over HTTP.

readResource

suspend fun readResource(uri: String): List<ResourceContents>?

The contents at uri, or null when no visible provider handles it, it can't be read, or the host's confirmer (configured for the provider's required tools) declined.