Add service and registrar for deprecated procedures

Co-authored-by: Ioannis Panagiotas <ioannis.panagiotas@neotechnology.com>

Author: vnickolov

metrics-api/src/main/java/org/neo4j/gds/metrics/procedures/DeprecatedProceduresMetricRegistrar.java

@@ -0,0 +1,25 @@
+/*
+ * Copyright (c) "Neo4j"
+ * Neo4j Sweden AB [http://neo4j.com]
+ *
+ * This file is part of Neo4j.
+ *
+ * Neo4j is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+package org.neo4j.gds.metrics.procedures;
+
+public interface DeprecatedProceduresMetricRegistrar {
+
+    void called(String deprecatedProcedure);
+}

metrics-api/src/main/java/org/neo4j/gds/metrics/procedures/DeprecatedProceduresMetricService.java

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+/*
+ * Copyright (c) "Neo4j"
+ * Neo4j Sweden AB [http://neo4j.com]
+ *
+ * This file is part of Neo4j.
+ *
+ * Neo4j is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+package org.neo4j.gds.metrics.procedures;
+
+public final class DeprecatedProceduresMetricService {
+
+    private final DeprecatedProceduresMetricRegistrar registrar;
+
+    public DeprecatedProceduresMetricService(DeprecatedProceduresMetricRegistrar registrar) {
+        this.registrar = registrar;
+    }
+
+    void called(String deprecatedProcedure) {
+        registrar.called(deprecatedProcedure);
+    }
+
+}

metrics-api/src/main/java/org/neo4j/gds/metrics/procedures/PassthroughDeprecatedProceduresMetricRegistrar.java

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+/*
+ * Copyright (c) "Neo4j"
+ * Neo4j Sweden AB [http://neo4j.com]
+ *
+ * This file is part of Neo4j.
+ *
+ * Neo4j is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+package org.neo4j.gds.metrics.procedures;
+
+/**
+ * No-op metrics registrar; to be used when metrics are not enabled in Neo4j.
+ */
+public class PassthroughDeprecatedProceduresMetricRegistrar implements DeprecatedProceduresMetricRegistrar {
+    @Override
+    public void called(String deprecatedProcedure) {}
+}

metrics-api/src/test/java/org/neo4j/gds/metrics/procedures/DeprecatedProceduresMetricServiceTest.java

@@ -0,0 +1,45 @@
+/*
+ * Copyright (c) "Neo4j"
+ * Neo4j Sweden AB [http://neo4j.com]
+ *
+ * This file is part of Neo4j.
+ *
+ * Neo4j is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+package org.neo4j.gds.metrics.procedures;
+
+import org.junit.jupiter.api.Test;
+
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.times;
+import static org.mockito.Mockito.verify;
+import static org.mockito.Mockito.verifyNoMoreInteractions;
+
+class DeprecatedProceduresMetricServiceTest {
+
+    @Test
+    void shouldRegisterCalledProcedure() {
+        // given
+        var registrarMock = mock(DeprecatedProceduresMetricRegistrar.class);
+        var proceduresMetricService = new DeprecatedProceduresMetricService(registrarMock);
+
+        // when
+        proceduresMetricService.called("gds.alpha.deprecated.procedure");
+
+        // then
+        verify(registrarMock, times(1)).called("gds.alpha.deprecated.procedure");
+        verifyNoMoreInteractions(registrarMock);
+    }
+
+}