Package org.apache.juneau.examples.mcp

Class NoteStore

java.lang.Object

org.apache.juneau.examples.mcp.NoteStore

public final class NoteStore
extends Object

The example's entire "domain": a tiny in-memory map of note title → note body.

Every MCP surface the ExampleMcpServer exposes (tools, prompt, resources, resource template, completions) is just a thin wrapper over this one object, so a reader can see the whole scenario at a glance without wading through business logic. It is deliberately trivial; the interesting part is the MCP wiring, not the storage.

Access is synchronized because subscription/tool handlers can run on different threads (the held-open SSE pump, concurrent HTTP requests). A LinkedHashMap keeps listing order stable so the demo output is deterministic.

Field Summary

Fields

Modifier and Type	Field	Description
static final String	SCHEME	URI scheme used to address a single note, e.g.

Constructor Summary

Constructors

Constructor	Description
NoteStore()

Method Summary

Modifier and Type	Method	Description
String	get(String title)	Returns the body of a note.
void	put(String title, String body)	Stores (or replaces) a note.
boolean	remove(String title)	Removes a note.
List<String>	titles()	Returns a snapshot of all note titles, in insertion order.
static String	uriFor(String title)	Builds the canonical resource URI for a note title (e.g.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Details

SCHEME

public static final String SCHEME

URI scheme used to address a single note, e.g. note:///groceries.

See Also:

• Constant Field Values

Constructor Details

NoteStore

public NoteStore()

Method Details

put

public void put(String title,
 String body)

Stores (or replaces) a note.

Parameters:

title - The note title (its key). Must not be null.

body - The note body. Must not be null.

get

public String get(String title)

Returns the body of a note.

Parameters:

title - The note title. Can be null.

Returns:

The body, or null if no such note exists.

remove

public boolean remove(String title)

Removes a note.

Parameters:

title - The note title. Can be null.

Returns:

true if a note was actually removed.

titles

public List<String> titles()

Returns a snapshot of all note titles, in insertion order.

Returns:

An immutable, point-in-time copy of the titles. Never null.

uriFor

public static String uriFor(String title)

Builds the canonical resource URI for a note title (e.g. note:///groceries).

Parameters:

title - The note title.

Returns:

The resource URI.