}

    public void setAvailable_Avg(ConditionOptionCall<AvgAggregationBuilder> opLambda) {
        setAvailable_Avg("available", opLambda);
    }

    public void setAvailable_Avg(String name, ConditionOptionCall<AvgAggregationBuilder> opLambda) {
        AvgAggregationBuilder builder = regAvgA(name, "available");
        if (opLambda != null) {
            opLambda.callback(builder);
        }
    }

    private String componentName;

    public ContainerNotAvailableException(final String componentName) {
        super(componentName + " is not available.");
    }

    public ContainerNotAvailableException(final String componentName, final Throwable cause) {
        super(componentName + " is not available.", cause);
        this.componentName = componentName;
    }

    public ContainerNotAvailableException(final Throwable cause) {

    }

    public void setAvailable_Avg(ConditionOptionCall<AvgAggregationBuilder> opLambda) {
        setAvailable_Avg("available", opLambda);
    }

    public void setAvailable_Avg(String name, ConditionOptionCall<AvgAggregationBuilder> opLambda) {
        AvgAggregationBuilder builder = regAvgA(name, "available");
        if (opLambda != null) {
            opLambda.callback(builder);
        }
    }

	// GetDiskFreeSpaceEx - https://msdn.microsoft.com/en-us/library/windows/desktop/aa364937(v=vs.85).aspx
	// Retrieves information about the amount of space that is available on a disk volume,
	// which is the total amount of space, the total amount of free space, and the total
	// amount of free space available to the user that is associated with the calling thread.
	GetDiskFreeSpaceEx = kernel32.NewProc("GetDiskFreeSpaceExW")

    }

    public List<WebConfig> getAllWebConfigList(final boolean withLabelType, final boolean withRoleType, final boolean available,
            final List<String> idList) {
        return ComponentUtil.getComponent(WebConfigBhv.class).selectList(cb -> {
            if (available) {
                cb.query().setAvailable_Equal(Constants.T);
            }
            if (idList != null) {

                                    <label for="available" class="col-sm-3 text-sm-right col-form-label"><la:message
                                            key="labels.available"/></label>
                                    <div class="col-sm-9">
                                        <la:errors property="available"/>
                                        <la:select styleId="available" property="available" styleClass="form-control">

Regular Reads will block until data is available, but not wait for a full buffer. 
Writes will block until there is space available and writes bigger than the buffer will wait for reads to make space.

`TryRead` and `TryWrite` are still available for non-blocking reads and writes.

    public boolean available() {
        final String ssoType = getSsoType();
        if (logger.isDebugEnabled()) {
            logger.debug("sso.type: {}", ssoType);
        }
        return !Constants.NONE.equals(ssoType);
    }

    public LoginCredential getLoginCredential() {
        if (available()) {
            final SsoAuthenticator authenticator = getAuthenticator();

SLEEP_TIME=60

printf "Verifying %s is available\n" "$ISTIO_ENVOY_RELEASE_URL"
until curl --output /dev/null --silent --head --fail "$ISTIO_ENVOY_RELEASE_URL"; do
    printf '.'
    sleep $SLEEP_TIME
done
printf '\n'

printf "Verifying %s is available\n" "$ISTIO_ENVOY_ARM_RELEASE_URL"
until curl --output /dev/null --silent --head --fail "$ISTIO_ENVOY_ARM_RELEASE_URL"; do

                                    <label for="available" class="col-sm-3 text-sm-right col-form-label"><la:message
                                            key="labels.available"/></label>
                                    <div class="col-sm-9">
                                        <la:errors property="available"/>
                                        <la:select styleId="available" property="available" styleClass="form-control">