17671055880

Committed 12 Sep 2025 09:53AM UTC coverage: 75.992% (-0.7%) from 76.74%

Build # 17671055880

Build Type

Pull #47

github

Committed by

web-flow

Commit Message

Merge b5202ad8e into 9231a160b

Pull Request Pull Request #47: Update nanopub java

Run Details

230 of 318 branches covered (72.33%)

Branch coverage included in aggregate %.

574 of 740 relevant lines covered (77.57%)

3.91 hits per line

Source File
Press 'n' to go to next uncovered line, 'b' for previous

86.4

src/main/java/com/knowledgepixels/query/StatusController.java

package com.knowledgepixels.query;

import org.eclipse.rdf4j.common.transaction.IsolationLevels;
import org.eclipse.rdf4j.model.Literal;
import org.eclipse.rdf4j.repository.RepositoryConnection;
import org.nanopub.vocabulary.NPA;

import java.util.Objects;

/**
 * Class to control the load status of the database.
 */
public class StatusController {

    /**
     * The load states in which the database can be.
     */
    public enum State {
        /**
         * The service is launching.
         */
        LAUNCHING,
        /**
         * The service is loading.
         */
        LOADING_INITIAL,
        /**
         * The service is loading updates.
         */
        LOADING_UPDATES,
        /**
         * The service is ready to serve requests.
         */
        READY,
    }

    /**
     * Get the singleton instance of the StatusController.
     *
     * @return the StatusController instance
     */
    public static StatusController get() {
        return instance;
    }

    private final static StatusController instance = new StatusController();

    private boolean initialized = false;
    private State state = null;
    private long lastCommittedCounter = -1;
    private RepositoryConnection adminRepoConn;

    /**
     * Represents the current status of the service, including the load counter.
     */
    public static class LoadingStatus {

        /**
         * The current state of the service.
         */
        public final State state;

        /**
         * The current load counter.
         */
        public final long loadCounter;

        private LoadingStatus(State state, long loadCounter) {
            this.state = state;
            this.loadCounter = loadCounter;
        }

        /**
         * Create a new LoadingStatus instance.
         *
         * @param state       the current state of the service
         * @param loadCounter the current load counter
         * @return a new LoadingStatus instance
         */
        public static LoadingStatus of(State state, long loadCounter) {
            return new LoadingStatus(state, loadCounter);
        }

        @Override
        public boolean equals(Object o) {
            if (o == null || getClass() != o.getClass()) {
                return false;
            }
            LoadingStatus that = (LoadingStatus) o;
            return loadCounter == that.loadCounter && state == that.state;
        }

        @Override
        public int hashCode() {
            return Objects.hash(state, loadCounter);
        }

    }

    /**
     * Initialize the StatusController, fetching the last known state from the DB.
     * This must be called right after service startup, before loading any nanopubs.
     *
     * @return the current state and the last committed counter
     */
    public LoadingStatus initialize() {
        synchronized (this) {
            if (initialized) {
                throw new IllegalStateException("Already initialized");
            }
            state = State.LAUNCHING;
            adminRepoConn = TripleStore.get().getAdminRepoConnection();
            // Serializable, as the service state needs to be strictly consistent
            adminRepoConn.begin(IsolationLevels.SERIALIZABLE);
            // Fetch the state from the DB
            try (var statements = adminRepoConn.getStatements(NPA.THIS_REPO, NPA.HAS_STATUS, null, NPA.GRAPH)) {
                if (!statements.hasNext()) {
                    adminRepoConn.add(NPA.THIS_REPO, NPA.HAS_STATUS, stateAsLiteral(state), NPA.GRAPH);
                } else {
                    var stateStatement = statements.next();
                    state = State.valueOf(stateStatement.getObject().stringValue());
                }
            }
            // Fetch the load counter from the DB
            try (var statements = adminRepoConn.getStatements(NPA.THIS_REPO, NPA.HAS_REGISTRY_LOAD_COUNTER, null, NPA.GRAPH)) {
                if (!statements.hasNext()) {
                    adminRepoConn.add(NPA.THIS_REPO, NPA.HAS_REGISTRY_LOAD_COUNTER, adminRepoConn.getValueFactory().createLiteral(-1L), NPA.GRAPH);
                } else {
                    var counterStatement = statements.next();
                    var stringVal = counterStatement.getObject().stringValue();
                    lastCommittedCounter = Long.parseLong(stringVal);
                }
                adminRepoConn.commit();
            } catch (Exception e) {
                if (adminRepoConn.isActive()) adminRepoConn.rollback();
                throw new RuntimeException(e);
            }
            initialized = true;
            return getState();
        }
    }

    /**
     * Get the current state of the service.
     *
     * @return the current state and the last committed counter
     */
    public LoadingStatus getState() {
        synchronized (this) {
            return LoadingStatus.of(state, lastCommittedCounter);
        }
    }

    /**
     * Transition the service to the LOADING_INITIAL state and update the load counter.
     * This should be called in two situations:
     * - By the main loading thread (after calling initialize()) to start loading the initial nanopubs.
     * - By the initial nanopub loader, as it processes the initial nanopubs.
     *
     * @param loadCounter the new load counter
     */
    public void setLoadingInitial(long loadCounter) {
        synchronized (this) {
            if (state != State.LAUNCHING && state != State.LOADING_INITIAL) {
                throw new IllegalStateException("Cannot transition to LOADING_INITIAL, as the " + "current state is " + state);
            }
            if (lastCommittedCounter > loadCounter) {
                throw new IllegalStateException("Cannot update the load counter from " + lastCommittedCounter + " to " + loadCounter);
            }
            updateState(State.LOADING_INITIAL, loadCounter);
        }
    }

    /**
     * Transition the service to the LOADING_UPDATES state and update the load counter.
     * This should be called by the updates loader, when it starts processing new nanopubs, or
     * when it finishes processing a batch of nanopubs.
     *
     * @param loadCounter the new load counter
     */
    public void setLoadingUpdates(long loadCounter) {
        synchronized (this) {
            if (state != State.LAUNCHING && state != State.LOADING_UPDATES && state != State.READY) {
                throw new IllegalStateException("Cannot transition to LOADING_UPDATES, as the " + "current state is " + state);
            }
            if (lastCommittedCounter > loadCounter) {
                throw new IllegalStateException("Cannot update the load counter from " + lastCommittedCounter + " to " + loadCounter);
            }
            updateState(State.LOADING_UPDATES, loadCounter);
        }
    }

    /**
     * Transition the service to the READY state.
     * This should be called by the loaders, after they finish their work.
     */
    public void setReady() {
        synchronized (this) {
            if (state != State.READY) {
                updateState(State.READY, lastCommittedCounter);
            }
        }
    }

    void updateState(State newState, long loadCounter) {
        synchronized (this) {
            try {
                // Serializable, as the service state needs to be strictly consistent
                adminRepoConn.begin(IsolationLevels.SERIALIZABLE);
                adminRepoConn.remove(NPA.THIS_REPO, NPA.HAS_STATUS, null, NPA.GRAPH);
                adminRepoConn.add(NPA.THIS_REPO, NPA.HAS_STATUS, stateAsLiteral(newState), NPA.GRAPH);
                adminRepoConn.remove(NPA.THIS_REPO, NPA.HAS_REGISTRY_LOAD_COUNTER, null, NPA.GRAPH);
                adminRepoConn.add(NPA.THIS_REPO, NPA.HAS_REGISTRY_LOAD_COUNTER, adminRepoConn.getValueFactory().createLiteral(loadCounter), NPA.GRAPH);
                adminRepoConn.commit();
                state = newState;
                lastCommittedCounter = loadCounter;
            } catch (Exception e) {
                if (adminRepoConn.isActive()) adminRepoConn.rollback();
                throw new RuntimeException(e);
            }
        }
    }

    private Literal stateAsLiteral(State s) {
        return adminRepoConn.getValueFactory().createLiteral(s.toString());
    }

    /**
     * Reset the StatusController for testing purposes.
     * This will clear the state and allow re-initialization.
     */
    void resetForTest() {
        synchronized (this) {
            initialized = false;
            state = null;
            lastCommittedCounter = -1;
            adminRepoConn = null;
        }
    }

}

1	package com.knowledgepixels.query;
2
3	import org.eclipse.rdf4j.common.transaction.IsolationLevels;
4	import org.eclipse.rdf4j.model.Literal;
5	import org.eclipse.rdf4j.repository.RepositoryConnection;
6	import org.nanopub.vocabulary.NPA;
7
8	import java.util.Objects;
9
10	/**
11	* Class to control the load status of the database.
12	*/
13	public class StatusController {	2✔
14
15	/**
16	* The load states in which the database can be.
17	*/
18	public enum State {	3✔
19	/**
20	* The service is launching.
21	*/
22	LAUNCHING,	6✔
23	/**
24	* The service is loading.
25	*/
26	LOADING_INITIAL,	6✔
27	/**
28	* The service is loading updates.
29	*/
30	LOADING_UPDATES,	6✔
31	/**
32	* The service is ready to serve requests.
33	*/
34	READY,	6✔
35	}
36
37	/**
38	* Get the singleton instance of the StatusController.
39	*
40	* @return the StatusController instance
41	*/
42	public static StatusController get() {
43	return instance;	2✔
44	}
45
46	private final static StatusController instance = new StatusController();	5✔
47
48	private boolean initialized = false;	3✔
49	private State state = null;	3✔
50	private long lastCommittedCounter = -1;	4✔
51	private RepositoryConnection adminRepoConn;
52
53	/**
54	* Represents the current status of the service, including the load counter.
55	*/
56	public static class LoadingStatus {
57
58	/**
59	* The current state of the service.
60	*/
61	public final State state;
62
63	/**
64	* The current load counter.
65	*/
66	public final long loadCounter;
67
68	private LoadingStatus(State state, long loadCounter) {	2✔
69	this.state = state;	3✔
70	this.loadCounter = loadCounter;	3✔
71	}	1✔
72
73	/**
74	* Create a new LoadingStatus instance.
75	*
76	* @param state the current state of the service
77	* @param loadCounter the current load counter
78	* @return a new LoadingStatus instance
79	*/
80	public static LoadingStatus of(State state, long loadCounter) {
81	return new LoadingStatus(state, loadCounter);	6✔
82	}
83
84	@Override
85	public boolean equals(Object o) {
86	if (o == null \|\| getClass() != o.getClass()) {	7✔
87	return false;	2✔
88	}
89	LoadingStatus that = (LoadingStatus) o;	3✔
90	return loadCounter == that.loadCounter && state == that.state;	15✔
91	}
92
93	@Override
94	public int hashCode() {
95	return Objects.hash(state, loadCounter);	15✔
96	}
97
98	}
99
100	/**
101	* Initialize the StatusController, fetching the last known state from the DB.
102	* This must be called right after service startup, before loading any nanopubs.
103	*
104	* @return the current state and the last committed counter
105	*/
106	public LoadingStatus initialize() {
107	synchronized (this) {	4✔
108	if (initialized) {	3✔
109	throw new IllegalStateException("Already initialized");	5✔
110	}
111	state = State.LAUNCHING;	3✔
112	adminRepoConn = TripleStore.get().getAdminRepoConnection();	4✔
113	// Serializable, as the service state needs to be strictly consistent
114	adminRepoConn.begin(IsolationLevels.SERIALIZABLE);	4✔
115	// Fetch the state from the DB
116	try (var statements = adminRepoConn.getStatements(NPA.THIS_REPO, NPA.HAS_STATUS, null, NPA.GRAPH)) {	13✔
117	if (!statements.hasNext()) {	3!
118	adminRepoConn.add(NPA.THIS_REPO, NPA.HAS_STATUS, stateAsLiteral(state), NPA.GRAPH);	16✔
119	} else {
120	var stateStatement = statements.next();	×
121	state = State.valueOf(stateStatement.getObject().stringValue());	×
122	}
123	}
124	// Fetch the load counter from the DB
125	try (var statements = adminRepoConn.getStatements(NPA.THIS_REPO, NPA.HAS_REGISTRY_LOAD_COUNTER, null, NPA.GRAPH)) {	13✔
126	if (!statements.hasNext()) {	3!
127	adminRepoConn.add(NPA.THIS_REPO, NPA.HAS_REGISTRY_LOAD_COUNTER, adminRepoConn.getValueFactory().createLiteral(-1L), NPA.GRAPH);	17✔
128	} else {
129	var counterStatement = statements.next();	×
130	var stringVal = counterStatement.getObject().stringValue();	×
131	lastCommittedCounter = Long.parseLong(stringVal);	×
132	}
133	adminRepoConn.commit();	3✔
134	} catch (Exception e) {	×
135	if (adminRepoConn.isActive()) adminRepoConn.rollback();	×
136	throw new RuntimeException(e);	×
137	}	1✔
138	initialized = true;	3✔
139	return getState();	5✔
140	}
141	}
142
143	/**
144	* Get the current state of the service.
145	*
146	* @return the current state and the last committed counter
147	*/
148	public LoadingStatus getState() {
149	synchronized (this) {	4✔
150	return LoadingStatus.of(state, lastCommittedCounter);	8✔
151	}
152	}
153
154	/**
155	* Transition the service to the LOADING_INITIAL state and update the load counter.
156	* This should be called in two situations:
157	* - By the main loading thread (after calling initialize()) to start loading the initial nanopubs.
158	* - By the initial nanopub loader, as it processes the initial nanopubs.
159	*
160	* @param loadCounter the new load counter
161	*/
162	public void setLoadingInitial(long loadCounter) {
163	synchronized (this) {	4✔
164	if (state != State.LAUNCHING && state != State.LOADING_INITIAL) {	8✔
165	throw new IllegalStateException("Cannot transition to LOADING_INITIAL, as the " + "current state is " + state);	8✔
166	}
167	if (lastCommittedCounter > loadCounter) {	5✔
168	throw new IllegalStateException("Cannot update the load counter from " + lastCommittedCounter + " to " + loadCounter);	8✔
169	}
170	updateState(State.LOADING_INITIAL, loadCounter);	4✔
171	}	3✔
172	}	1✔
173
174	/**
175	* Transition the service to the LOADING_UPDATES state and update the load counter.
176	* This should be called by the updates loader, when it starts processing new nanopubs, or
177	* when it finishes processing a batch of nanopubs.
178	*
179	* @param loadCounter the new load counter
180	*/
181	public void setLoadingUpdates(long loadCounter) {
182	synchronized (this) {	4✔
183	if (state != State.LAUNCHING && state != State.LOADING_UPDATES && state != State.READY) {	12✔
184	throw new IllegalStateException("Cannot transition to LOADING_UPDATES, as the " + "current state is " + state);	8✔
185	}
186	if (lastCommittedCounter > loadCounter) {	5✔
187	throw new IllegalStateException("Cannot update the load counter from " + lastCommittedCounter + " to " + loadCounter);	8✔
188	}
189	updateState(State.LOADING_UPDATES, loadCounter);	4✔
190	}	3✔
191	}	1✔
192
193	/**
194	* Transition the service to the READY state.
195	* This should be called by the loaders, after they finish their work.
196	*/
197	public void setReady() {
198	synchronized (this) {	4✔
199	if (state != State.READY) {	4✔
200	updateState(State.READY, lastCommittedCounter);	5✔
201	}
202	}	3✔
203	}	1✔
204
205	void updateState(State newState, long loadCounter) {
206	synchronized (this) {	4✔
207	try {
208	// Serializable, as the service state needs to be strictly consistent
209	adminRepoConn.begin(IsolationLevels.SERIALIZABLE);	4✔
210	adminRepoConn.remove(NPA.THIS_REPO, NPA.HAS_STATUS, null, NPA.GRAPH);	12✔
211	adminRepoConn.add(NPA.THIS_REPO, NPA.HAS_STATUS, stateAsLiteral(newState), NPA.GRAPH);	14✔
212	adminRepoConn.remove(NPA.THIS_REPO, NPA.HAS_REGISTRY_LOAD_COUNTER, null, NPA.GRAPH);	12✔
213	adminRepoConn.add(NPA.THIS_REPO, NPA.HAS_REGISTRY_LOAD_COUNTER, adminRepoConn.getValueFactory().createLiteral(loadCounter), NPA.GRAPH);	16✔
214	adminRepoConn.commit();	3✔
215	state = newState;	3✔
216	lastCommittedCounter = loadCounter;	3✔
217	} catch (Exception e) {	×
218	if (adminRepoConn.isActive()) adminRepoConn.rollback();	×
219	throw new RuntimeException(e);	×
220	}	1✔
221	}	3✔
222	}	1✔
223
224	private Literal stateAsLiteral(State s) {
225	return adminRepoConn.getValueFactory().createLiteral(s.toString());	7✔
226	}
227
228	/**
229	* Reset the StatusController for testing purposes.
230	* This will clear the state and allow re-initialization.
231	*/
232	void resetForTest() {
233	synchronized (this) {	4✔
234	initialized = false;	3✔
235	state = null;	3✔
236	lastCommittedCounter = -1;	3✔
237	adminRepoConn = null;	3✔
238	}	3✔
239	}	1✔
240
241	}

knowledgepixels / nanopub-query / 17671055880

Source File Press 'n' to go to next uncovered line, 'b' for previous

Source File
Press 'n' to go to next uncovered line, 'b' for previous