org.apache.slider.core.conf.AggregateConf.java Source code

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Here is the source code for org.apache.slider.core.conf.AggregateConf.java

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/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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.
 */

package org.apache.slider.core.conf;

import org.apache.commons.lang.RandomStringUtils;
import org.apache.slider.common.SliderKeys;
import org.apache.slider.core.exceptions.BadConfigException;
import org.codehaus.jackson.annotate.JsonIgnore;
import org.codehaus.jackson.annotate.JsonIgnoreProperties;
import org.codehaus.jackson.map.annotate.JsonSerialize;

import java.io.IOException;

/**
 * Aggregate Configuration.
 *
 * It is serializable to JSON
 */
@JsonIgnoreProperties(ignoreUnknown = true)
@JsonSerialize(include = JsonSerialize.Inclusion.NON_NULL)
public final class AggregateConf {

    private String name;
    private ConfTree resources;
    private ConfTree internal;
    private ConfTree appConf;

    private ConfTreeOperations resourceOperations;
    private ConfTreeOperations appConfOperations;
    private ConfTreeOperations internalOperations;

    private String passphrase;

    public AggregateConf() {
        this(new ConfTree(), new ConfTree(), new ConfTree());
    }

    public AggregateConf(String name) {
        this(new ConfTree(), new ConfTree(), new ConfTree());
        this.name = name;
    }

    public AggregateConf(ConfTree resources, ConfTree appConf, ConfTree internal) {
        setResources(resources);
        setAppConf(appConf);
        setInternal(internal);
    }

    /**
     * Take a snapshot of the configuration
     * @param instanceDefinition source
     * @throws IOException marshalling/copying problems
     */
    public AggregateConf(AggregateConf instanceDefinition) throws IOException {
        ConfTreeOperations resourcesSnapshot = ConfTreeOperations.fromInstance(instanceDefinition.getResources());
        ConfTreeOperations appConfSnapshot = ConfTreeOperations.fromInstance(instanceDefinition.getAppConf());
        ConfTreeOperations internalsSnapshot = ConfTreeOperations.fromInstance(instanceDefinition.getInternal());
        //build a new aggregate from the snapshots
        setResources(resourcesSnapshot.confTree);
        setAppConf(appConfSnapshot.confTree);
        setInternal(internalsSnapshot.confTree);
    }

    public void setResources(ConfTree resources) {
        this.resources = resources;
        resourceOperations = new ConfTreeOperations(resources);
    }

    public void setAppConf(ConfTree appConf) {
        this.appConf = appConf;
        appConfOperations = new ConfTreeOperations(appConf);
    }

    public ConfTree getInternal() {
        return internal;
    }

    public void setInternal(ConfTree internal) {
        this.internal = internal;
        internalOperations = new ConfTreeOperations(internal);
    }

    public ConfTree getResources() {
        return resources;
    }

    public ConfTree getAppConf() {
        return appConf;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    @JsonIgnore
    public ConfTreeOperations getResourceOperations() {
        return resourceOperations;
    }

    @JsonIgnore
    public ConfTreeOperations getAppConfOperations() {
        return appConfOperations;
    }

    @JsonIgnore
    public ConfTreeOperations getInternalOperations() {
        return internalOperations;
    }

    /**
     * predicate to query if all sections have data structures
     * @return true if every section is non-null
     */
    @JsonIgnore
    public boolean isComplete() {
        return resources != null && appConf != null && internal != null;
    }

    public void validate() throws BadConfigException {
        if (!isComplete()) {
            throw new BadConfigException("Incomplete instance %s", this);
        }
        resourceOperations.validate();
        internalOperations.validate();
        appConfOperations.validate();
    }

    public void resolve() throws BadConfigException {
        validate();
        resourceOperations.resolve();
        internalOperations.resolve();
        appConfOperations.resolve();
    }

    @JsonIgnore
    public String getPassphrase() {
        if (passphrase == null) {
            passphrase = RandomStringUtils.randomAlphanumeric(Integer.valueOf(SliderKeys.PASS_LEN));
        }

        return passphrase;
    }

    /**
     * string operation includes all the inner conftrees
     * @return a string description
     */
    @Override
    public String toString() {
        final StringBuilder sb = new StringBuilder("{");
        sb.append(",\n\"internal\": ").append(internal);
        sb.append(",\n\"resources\": ").append(resources);
        sb.append(",\n\"appConf\" :").append(appConf);
        sb.append('}');
        return sb.toString();
    }
}