Add A1 PMS participant

Issue-ID: CCSDK-3816
Signed-off-by: aravind.est <aravindhan.a@est.tech>
Change-Id: I00c04542f5ec4672b1c3a29ca32477bf5d2ca336

11 files changed, 692 insertions, 0 deletions

diff --git a/participant/participant-impl/participant-impl-a1pms/src/main/java/org/onap/policy/clamp/acm/participant/a1pms/Application.java b/participant/participant-impl/participant-impl-a1pms/src/main/java/org/onap/policy/clamp/acm/participant/a1pms/Application.java
new file mode 100755
index 000000000..1adf5cdb1
--- /dev/null
+++ b/participant/participant-impl/participant-impl-a1pms/src/main/java/org/onap/policy/clamp/acm/participant/a1pms/Application.java
@@ -0,0 +1,48 @@
+/*-
+ * ============LICENSE_START=======================================================
+ *  Copyright (C) 2022 Nordix Foundation.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.clamp.acm.participant.a1pms;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.boot.context.properties.ConfigurationPropertiesScan;
+import org.springframework.context.annotation.ComponentScan;
+
+/**
+ * Starter.
+ */
+// @formatter:off
+@SpringBootApplication
+@ComponentScan({
+    "org.onap.policy.clamp.acm.participant.a1pms",
+    "org.onap.policy.clamp.acm.participant.intermediary"
+})
+@ConfigurationPropertiesScan("org.onap.policy.clamp.acm.participant.a1pms.parameters")
+//@formatter:on
+public class Application {
+    /**
+     * Main class.
+     *
+     * @param args args
+     */
+    public static void main(String[] args) {
+        SpringApplication.run(Application.class, args);
+    }
+}
diff --git a/participant/participant-impl/participant-impl-a1pms/src/main/java/org/onap/policy/clamp/acm/participant/a1pms/config/MicrometerConfig.java b/participant/participant-impl/participant-impl-a1pms/src/main/java/org/onap/policy/clamp/acm/participant/a1pms/config/MicrometerConfig.java
new file mode 100755
index 000000000..5e3441d82
--- /dev/null
+++ b/participant/participant-impl/participant-impl-a1pms/src/main/java/org/onap/policy/clamp/acm/participant/a1pms/config/MicrometerConfig.java
@@ -0,0 +1,46 @@
+/*-
+ * ============LICENSE_START=======================================================
+ * Copyright (C) 2022 Nordix Foundation.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.clamp.acm.participant.a1pms.config;
+
+import io.micrometer.core.aop.TimedAspect;
+import io.micrometer.core.instrument.MeterRegistry;
+import org.springframework.beans.factory.InitializingBean;
+import org.springframework.beans.factory.config.BeanPostProcessor;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+
+@Configuration
+public class MicrometerConfig {
+
+    /**
+     * Load up the metrics registry.
+     */
+    @Bean
+    public InitializingBean forcePrometheusPostProcessor(BeanPostProcessor meterRegistryPostProcessor,
+            MeterRegistry registry) {
+        return () -> meterRegistryPostProcessor.postProcessAfterInitialization(registry, "");
+    }
+
+    @Bean
+    public TimedAspect timedAspect(MeterRegistry registry) {
+        return new TimedAspect(registry);
+    }
+}
diff --git a/participant/participant-impl/participant-impl-a1pms/src/main/java/org/onap/policy/clamp/acm/participant/a1pms/config/ParticipantConfig.java b/participant/participant-impl/participant-impl-a1pms/src/main/java/org/onap/policy/clamp/acm/participant/a1pms/config/ParticipantConfig.java
new file mode 100755
index 000000000..7158b5d53
--- /dev/null
+++ b/participant/participant-impl/participant-impl-a1pms/src/main/java/org/onap/policy/clamp/acm/participant/a1pms/config/ParticipantConfig.java
@@ -0,0 +1,43 @@
+/*-
+ * ============LICENSE_START=======================================================
+ *  Copyright (C) 2022 Nordix Foundation.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.clamp.acm.participant.a1pms.config;
+
+import org.onap.policy.clamp.acm.participant.a1pms.handler.AutomationCompositionElementHandler;
+import org.onap.policy.clamp.acm.participant.intermediary.api.ParticipantIntermediaryApi;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.context.annotation.Configuration;
+
+@Configuration
+public class ParticipantConfig {
+
+    /**
+     * Register AutomationCompositionElementListener.
+     *
+     * @param intermediaryApi the ParticipantIntermediaryApi
+     * @param acElementHandler the AutomationComposition Element Handler
+     */
+    @Autowired
+    public void registerAutomationCompositionElementListener(ParticipantIntermediaryApi intermediaryApi,
+            AutomationCompositionElementHandler acElementHandler) {
+        intermediaryApi.registerAutomationCompositionElementListener(acElementHandler);
+        acElementHandler.setIntermediaryApi(intermediaryApi);
+    }
+}
diff --git a/participant/participant-impl/participant-impl-a1pms/src/main/java/org/onap/policy/clamp/acm/participant/a1pms/config/SecurityConfig.java b/participant/participant-impl/participant-impl-a1pms/src/main/java/org/onap/policy/clamp/acm/participant/a1pms/config/SecurityConfig.java
new file mode 100755
index 000000000..fdbbc4558
--- /dev/null
+++ b/participant/participant-impl/participant-impl-a1pms/src/main/java/org/onap/policy/clamp/acm/participant/a1pms/config/SecurityConfig.java
@@ -0,0 +1,45 @@
+/*-
+ * ========================LICENSE_START=================================
+ * Copyright (C) 2022 Nordix Foundation. All rights reserved.
+ * ======================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ========================LICENSE_END===================================
+ */
+
+package org.onap.policy.clamp.acm.participant.a1pms.config;
+
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.security.config.annotation.web.builders.HttpSecurity;
+import org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter;
+
+@Configuration
+public class SecurityConfig extends WebSecurityConfigurerAdapter {
+
+    @Value("${security.enable-csrf:true}")
+    private boolean csrfEnabled = true;
+
+    @Override
+    protected void configure(HttpSecurity http) throws Exception {
+        // @formatter:off
+        http.authorizeRequests()
+            .antMatchers().authenticated()
+            .anyRequest().authenticated()
+            .and().httpBasic();
+        // @formatter:on
+
+        if (!csrfEnabled) {
+            http.csrf().disable();
+        }
+    }
+}
diff --git a/participant/participant-impl/participant-impl-a1pms/src/main/java/org/onap/policy/clamp/acm/participant/a1pms/exception/A1PolicyServiceException.java b/participant/participant-impl/participant-impl-a1pms/src/main/java/org/onap/policy/clamp/acm/participant/a1pms/exception/A1PolicyServiceException.java
new file mode 100755
index 000000000..3a7ac7d9f
--- /dev/null
+++ b/participant/participant-impl/participant-impl-a1pms/src/main/java/org/onap/policy/clamp/acm/participant/a1pms/exception/A1PolicyServiceException.java
@@ -0,0 +1,35 @@
+/*-
+ * ============LICENSE_START=======================================================
+ *  Copyright (C) 2022 Nordix Foundation.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.clamp.acm.participant.a1pms.exception;
+
+import javax.ws.rs.core.Response;
+import org.onap.policy.models.base.PfModelException;
+
+public class A1PolicyServiceException extends PfModelException {
+
+    public A1PolicyServiceException(int statusCode, String message) {
+        super(Response.Status.fromStatusCode(statusCode), message);
+    }
+
+    public A1PolicyServiceException(int statusCode, String message, Exception e) {
+        super(Response.Status.fromStatusCode(statusCode), message, e);
+    }
+}
diff --git a/participant/participant-impl/participant-impl-a1pms/src/main/java/org/onap/policy/clamp/acm/participant/a1pms/handler/AutomationCompositionElementHandler.java b/participant/participant-impl/participant-impl-a1pms/src/main/java/org/onap/policy/clamp/acm/participant/a1pms/handler/AutomationCompositionElementHandler.java
new file mode 100755
index 000000000..072d14475
--- /dev/null
+++ b/participant/participant-impl/participant-impl-a1pms/src/main/java/org/onap/policy/clamp/acm/participant/a1pms/handler/AutomationCompositionElementHandler.java
@@ -0,0 +1,156 @@
+/*-
+ * ============LICENSE_START=======================================================
+ *  Copyright (C) 2022 Nordix Foundation.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.clamp.acm.participant.a1pms.handler;
+
+import java.lang.invoke.MethodHandles;
+import java.util.HashMap;
+import java.util.Map;
+import java.util.Set;
+import java.util.UUID;
+import javax.validation.ConstraintViolation;
+import javax.validation.Validation;
+import javax.validation.ValidationException;
+import lombok.AccessLevel;
+import lombok.Getter;
+import lombok.RequiredArgsConstructor;
+import lombok.Setter;
+import org.apache.http.HttpStatus;
+import org.onap.policy.clamp.acm.participant.a1pms.exception.A1PolicyServiceException;
+import org.onap.policy.clamp.acm.participant.a1pms.models.ConfigurationEntity;
+import org.onap.policy.clamp.acm.participant.a1pms.webclient.AcA1PmsClient;
+import org.onap.policy.clamp.acm.participant.intermediary.api.AutomationCompositionElementListener;
+import org.onap.policy.clamp.acm.participant.intermediary.api.ParticipantIntermediaryApi;
+import org.onap.policy.clamp.models.acm.concepts.AutomationCompositionElement;
+import org.onap.policy.clamp.models.acm.concepts.AutomationCompositionOrderedState;
+import org.onap.policy.clamp.models.acm.concepts.AutomationCompositionState;
+import org.onap.policy.clamp.models.acm.messages.dmaap.participant.ParticipantMessageType;
+import org.onap.policy.common.utils.coder.Coder;
+import org.onap.policy.common.utils.coder.CoderException;
+import org.onap.policy.common.utils.coder.StandardCoder;
+import org.onap.policy.models.base.PfModelException;
+import org.onap.policy.models.tosca.authorative.concepts.ToscaConceptIdentifier;
+import org.onap.policy.models.tosca.authorative.concepts.ToscaNodeTemplate;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.stereotype.Component;
+
+/**
+ * This class handles implementation of automationCompositionElement updates.
+ */
+@Component
+@RequiredArgsConstructor
+public class AutomationCompositionElementHandler implements AutomationCompositionElementListener {
+
+    private static final Coder CODER = new StandardCoder();
+
+    private static final Logger LOGGER = LoggerFactory.getLogger(MethodHandles.lookup().lookupClass());
+
+    @Setter
+    private ParticipantIntermediaryApi intermediaryApi;
+
+    private final AcA1PmsClient acA1PmsClient;
+
+    // Map of acElement Id and A1PMS services
+    @Getter(AccessLevel.PACKAGE)
+    private final Map<UUID, ConfigurationEntity> configRequestMap = new HashMap<>();
+
+    /**
+     * Handle a automation composition element state change.
+     *
+     * @param automationCompositionElementId the ID of the automation composition element
+     * @param currentState                   the current state of the automation composition element
+     * @param newState                       the state to which the automation composition element is changing to
+     * @throws PfModelException in case of a model exception
+     */
+    @Override
+    public void automationCompositionElementStateChange(ToscaConceptIdentifier automationCompositionId,
+            UUID automationCompositionElementId, AutomationCompositionState currentState,
+            AutomationCompositionOrderedState newState) throws A1PolicyServiceException {
+        switch (newState) {
+            case UNINITIALISED:
+                ConfigurationEntity configurationEntity = configRequestMap.get(automationCompositionElementId);
+                if (configurationEntity != null && acA1PmsClient.isPmsHealthy()) {
+                    acA1PmsClient.deleteService(configurationEntity.getPolicyServiceEntities());
+                    configRequestMap.remove(automationCompositionElementId);
+                    intermediaryApi.updateAutomationCompositionElementState(automationCompositionId,
+                            automationCompositionElementId, newState, AutomationCompositionState.UNINITIALISED,
+                            ParticipantMessageType.AUTOMATION_COMPOSITION_STATE_CHANGE);
+                } else {
+                    LOGGER.warn("Failed to connect with A1PMS. Service configuration is: {}", configurationEntity);
+                    throw new A1PolicyServiceException(HttpStatus.SC_SERVICE_UNAVAILABLE,
+                            "Unable to connect with A1PMS");
+                }
+                break;
+            case PASSIVE:
+                intermediaryApi.updateAutomationCompositionElementState(automationCompositionId,
+                        automationCompositionElementId, newState, AutomationCompositionState.PASSIVE,
+                        ParticipantMessageType.AUTOMATION_COMPOSITION_STATE_CHANGE);
+                break;
+            case RUNNING:
+                intermediaryApi.updateAutomationCompositionElementState(automationCompositionId,
+                        automationCompositionElementId, newState, AutomationCompositionState.RUNNING,
+                        ParticipantMessageType.AUTOMATION_COMPOSITION_STATE_CHANGE);
+                break;
+            default:
+                LOGGER.warn("Cannot transition from state {} to state {}", currentState, newState);
+                break;
+        }
+    }
+
+    /**
+     * Callback method to handle an update on an automation composition element.
+     *
+     * @param element      the information on the automation composition element
+     * @param nodeTemplate toscaNodeTemplate
+     */
+    @Override
+    public void automationCompositionElementUpdate(ToscaConceptIdentifier automationCompositionId,
+            AutomationCompositionElement element, ToscaNodeTemplate nodeTemplate) throws A1PolicyServiceException {
+        try {
+            var configurationEntity = CODER.convert(nodeTemplate.getProperties(), ConfigurationEntity.class);
+            Set<ConstraintViolation<ConfigurationEntity>> violations =
+                    Validation.buildDefaultValidatorFactory().getValidator().validate(configurationEntity);
+            if (violations.isEmpty()) {
+                if (acA1PmsClient.isPmsHealthy()) {
+                    acA1PmsClient.createService(configurationEntity.getPolicyServiceEntities());
+                    configRequestMap.put(element.getId(), configurationEntity);
+
+                    intermediaryApi.updateAutomationCompositionElementState(automationCompositionId, element.getId(),
+                            AutomationCompositionOrderedState.PASSIVE, AutomationCompositionState.PASSIVE,
+                            ParticipantMessageType.AUTOMATION_COMPOSITION_STATE_CHANGE);
+                } else {
+                    LOGGER.error("Failed to connect with A1PMS");
+                    throw new A1PolicyServiceException(HttpStatus.SC_SERVICE_UNAVAILABLE,
+                            "Unable to connect with A1PMS");
+                }
+            } else {
+                LOGGER.error("Violations found in the config request parameters: {}", violations);
+                throw new ValidationException("Constraint violations in the config request");
+            }
+        } catch (ValidationException | CoderException e) {
+            LOGGER.error("Error invoking the A1PMS request for the config ", e);
+            throw new A1PolicyServiceException(HttpStatus.SC_BAD_REQUEST, "Invalid Configuration", e);
+        } catch (A1PolicyServiceException e) {
+            LOGGER.error("Error invoking the A1PMS request for the config ", e);
+            throw e;
+        }
+    }
+}
diff --git a/participant/participant-impl/participant-impl-a1pms/src/main/java/org/onap/policy/clamp/acm/participant/a1pms/models/A1PolicyServiceEntity.java b/participant/participant-impl/participant-impl-a1pms/src/main/java/org/onap/policy/clamp/acm/participant/a1pms/models/A1PolicyServiceEntity.java
new file mode 100755
index 000000000..991cb926f
--- /dev/null
+++ b/participant/participant-impl/participant-impl-a1pms/src/main/java/org/onap/policy/clamp/acm/participant/a1pms/models/A1PolicyServiceEntity.java
@@ -0,0 +1,54 @@
+/*-
+ * ============LICENSE_START=======================================================
+ *  Copyright (C) 2022 Nordix Foundation.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.clamp.acm.participant.a1pms.models;
+
+import com.fasterxml.jackson.annotation.JsonGetter;
+import com.fasterxml.jackson.annotation.JsonIgnore;
+import com.fasterxml.jackson.databind.PropertyNamingStrategies;
+import com.fasterxml.jackson.databind.annotation.JsonNaming;
+import javax.validation.constraints.NotNull;
+import javax.ws.rs.DefaultValue;
+import lombok.AllArgsConstructor;
+import lombok.Data;
+import lombok.Getter;
+import org.onap.policy.models.tosca.authorative.concepts.ToscaConceptIdentifier;
+
+@Data
+@AllArgsConstructor
+@JsonNaming(PropertyNamingStrategies.SnakeCaseStrategy.class)
+public class A1PolicyServiceEntity {
+
+    @NotNull
+    @JsonIgnore
+    private ToscaConceptIdentifier a1PolicyServiceEntityId;
+
+    @NotNull
+    @Getter(onMethod_ = {@JsonGetter(value = "service_id")})
+    private String clientId;
+
+    @NotNull
+    private String callbackUrl;
+
+    @NotNull
+    @DefaultValue("0")
+    private int keepAliveIntervalSeconds;
+
+}
diff --git a/participant/participant-impl/participant-impl-a1pms/src/main/java/org/onap/policy/clamp/acm/participant/a1pms/models/ConfigurationEntity.java b/participant/participant-impl/participant-impl-a1pms/src/main/java/org/onap/policy/clamp/acm/participant/a1pms/models/ConfigurationEntity.java
new file mode 100755
index 000000000..80715c27c
--- /dev/null
+++ b/participant/participant-impl/participant-impl-a1pms/src/main/java/org/onap/policy/clamp/acm/participant/a1pms/models/ConfigurationEntity.java
@@ -0,0 +1,37 @@
+/*-
+ * ============LICENSE_START=======================================================
+ *  Copyright (C) 2022 Nordix Foundation.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.clamp.acm.participant.a1pms.models;
+
+import java.util.List;
+import javax.validation.Valid;
+import javax.validation.constraints.NotNull;
+import lombok.AllArgsConstructor;
+import lombok.Data;
+
+@Data
+@AllArgsConstructor
+public class ConfigurationEntity {
+
+    @NotNull
+    @Valid
+    private List<A1PolicyServiceEntity> policyServiceEntities;
+
+}
diff --git a/participant/participant-impl/participant-impl-a1pms/src/main/java/org/onap/policy/clamp/acm/participant/a1pms/parameters/A1PmsParameters.java b/participant/participant-impl/participant-impl-a1pms/src/main/java/org/onap/policy/clamp/acm/participant/a1pms/parameters/A1PmsParameters.java
new file mode 100755
index 000000000..704ef4153
--- /dev/null
+++ b/participant/participant-impl/participant-impl-a1pms/src/main/java/org/onap/policy/clamp/acm/participant/a1pms/parameters/A1PmsParameters.java
@@ -0,0 +1,55 @@
+/*-
+ * ============LICENSE_START=======================================================
+ *  Copyright (C) 2022 Nordix Foundation.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.clamp.acm.participant.a1pms.parameters;
+
+import java.util.Map;
+import javax.validation.constraints.NotNull;
+import lombok.Data;
+import org.springframework.boot.context.properties.ConfigurationProperties;
+import org.springframework.validation.annotation.Validated;
+
+/**
+ * Class to hold all parameters needed for the A1PMS participant.
+ */
+@Validated
+@Data
+@ConfigurationProperties(prefix = "a1pms")
+public class A1PmsParameters {
+
+    @NotNull
+    private String baseUrl;
+
+    @NotNull
+    private Endpoints endpoints;
+
+    @NotNull
+    private Map<String, String> headers;
+
+    @Data
+    public static class Endpoints {
+
+        String health;
+
+        String services;
+
+        String service;
+    }
+}
diff --git a/participant/participant-impl/participant-impl-a1pms/src/main/java/org/onap/policy/clamp/acm/participant/a1pms/parameters/A1PmsParticipantParameters.java b/participant/participant-impl/participant-impl-a1pms/src/main/java/org/onap/policy/clamp/acm/participant/a1pms/parameters/A1PmsParticipantParameters.java
new file mode 100755
index 000000000..b3e036041
--- /dev/null
+++ b/participant/participant-impl/participant-impl-a1pms/src/main/java/org/onap/policy/clamp/acm/participant/a1pms/parameters/A1PmsParticipantParameters.java
@@ -0,0 +1,44 @@
+/*-
+ * ============LICENSE_START=======================================================
+ *  Copyright (C) 2022 Nordix Foundation.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.clamp.acm.participant.a1pms.parameters;
+
+import javax.validation.Valid;
+import javax.validation.constraints.NotNull;
+import lombok.Getter;
+import lombok.Setter;
+import org.onap.policy.clamp.acm.participant.intermediary.parameters.ParticipantIntermediaryParameters;
+import org.onap.policy.clamp.acm.participant.intermediary.parameters.ParticipantParameters;
+import org.springframework.boot.context.properties.ConfigurationProperties;
+import org.springframework.validation.annotation.Validated;
+
+/**
+ * Class to hold all parameters needed for the A1PMS participant.
+ */
+@Validated
+@Getter
+@Setter
+@ConfigurationProperties(prefix = "participant")
+public class A1PmsParticipantParameters implements ParticipantParameters {
+
+    @NotNull
+    @Valid
+    private ParticipantIntermediaryParameters intermediaryParameters;
+}
diff --git a/participant/participant-impl/participant-impl-a1pms/src/main/java/org/onap/policy/clamp/acm/participant/a1pms/webclient/AcA1PmsClient.java b/participant/participant-impl/participant-impl-a1pms/src/main/java/org/onap/policy/clamp/acm/participant/a1pms/webclient/AcA1PmsClient.java
new file mode 100755
index 000000000..25fb67fb7
--- /dev/null
+++ b/participant/participant-impl/participant-impl-a1pms/src/main/java/org/onap/policy/clamp/acm/participant/a1pms/webclient/AcA1PmsClient.java
@@ -0,0 +1,129 @@
+/*-
+ * ============LICENSE_START=======================================================
+ *  Copyright (C) 2022 Nordix Foundation.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.clamp.acm.participant.a1pms.webclient;
+
+import java.lang.invoke.MethodHandles;
+import java.util.List;
+import java.util.Map;
+import java.util.Objects;
+import java.util.function.Predicate;
+import lombok.RequiredArgsConstructor;
+import org.onap.policy.clamp.acm.participant.a1pms.exception.A1PolicyServiceException;
+import org.onap.policy.clamp.acm.participant.a1pms.models.A1PolicyServiceEntity;
+import org.onap.policy.clamp.acm.participant.a1pms.parameters.A1PmsParameters;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.http.HttpHeaders;
+import org.springframework.http.HttpMethod;
+import org.springframework.http.HttpStatus;
+import org.springframework.stereotype.Component;
+import org.springframework.web.reactive.function.client.WebClient;
+import reactor.core.publisher.Mono;
+
+@Component
+@RequiredArgsConstructor
+public class AcA1PmsClient {
+
+    private final A1PmsParameters a1PmsParameters;
+
+    private static final Logger LOGGER = LoggerFactory.getLogger(MethodHandles.lookup().lookupClass());
+
+    /**
+     * Get webclient for A1PMS.
+     *
+     * @return webClient
+     */
+    private WebClient getPmsClient() {
+        return WebClient.builder().baseUrl(a1PmsParameters.getBaseUrl())
+                       .defaultHeaders(httpHeaders -> httpHeaders.addAll(createHeaders())).build();
+    }
+
+    /**
+     * Get A1PMS health status.
+     *
+     * @return whether A1PMS is healthy
+     */
+    public boolean isPmsHealthy() {
+        return Objects.equals(Boolean.TRUE,
+                getPmsClient().method(HttpMethod.GET).uri(a1PmsParameters.getEndpoints().getHealth())
+                        .exchangeToMono(clientResponse -> Mono.just(clientResponse.statusCode().is2xxSuccessful()))
+                        .block());
+    }
+
+
+    /**
+     * Create service in A1PMS.
+     * @param policyServiceEntities List of service entities
+     * @throws A1PolicyServiceException Exception on creating service
+     */
+    public void createService(List<A1PolicyServiceEntity> policyServiceEntities) throws A1PolicyServiceException {
+        policyServiceEntities.forEach(
+                a1PolicyServiceEntity -> getPmsClient().method(HttpMethod.PUT)
+                                           .uri(a1PmsParameters.getEndpoints().getServices())
+                                           .bodyValue(a1PolicyServiceEntity).retrieve()
+                                           .onStatus(HttpStatus::isError,
+                                                   clientResponse -> Mono.error(new A1PolicyServiceException(
+                                                                   clientResponse.statusCode().value(),
+                                                                   "Error in creating policy service")))
+                                           .onStatus(Predicate.isEqual(HttpStatus.OK),
+                                                   clientResponse -> {
+                                                       LOGGER.warn("Client {} already exists and the configuration "
+                                                                           + "is updated",
+                                                               a1PolicyServiceEntity.getClientId());
+                                                       return Mono.empty();
+                                                   })
+                                           .toBodilessEntity()
+                                           .block());
+    }
+
+    /**
+     * Delete service in A1PMS.
+     * @param policyServiceEntities List of service entities
+     * @throws A1PolicyServiceException Exception on deleting service
+     */
+    public void deleteService(List<A1PolicyServiceEntity> policyServiceEntities) throws A1PolicyServiceException {
+        policyServiceEntities.forEach(
+                a1PolicyServiceEntity -> getPmsClient().method(HttpMethod.DELETE)
+                                             .uri(a1PmsParameters.getEndpoints().getService(),
+                                                     a1PolicyServiceEntity.getClientId())
+                                             .bodyValue(a1PolicyServiceEntity).retrieve()
+                                             .onStatus(HttpStatus::isError,
+                                                     clientResponse -> Mono.error(
+                                                             new A1PolicyServiceException(
+                                                                     clientResponse.statusCode().value(),
+                                                                     "Error in deleting policy service")))
+                                             .toBodilessEntity()
+                                             .block());
+    }
+
+    /**
+     * Prepare the Http headers to call A1PMS.
+     *
+     * @return httpHeaders
+     */
+    private HttpHeaders createHeaders() {
+        var headers = new HttpHeaders();
+        for (Map.Entry<String, String> entry : a1PmsParameters.getHeaders().entrySet()) {
+            headers.add(entry.getKey(), entry.getValue());
+        }
+        return headers;
+    }
+}